Ants are probably the most dominant insect group on Earth, representing ten to fifteen percent of animal biomass in terrestrial ecosystems. Flowering plants, meanwhile, owe their evolutionary success to an array of interspecific interactions-such as pollination, seed dispersal, and herbivory-that have helped to shape their great diversity. The Ecology and Evolution of Ant-Plant Interactions brings together findings from the scientific literature on the coevolution of ants and plants to provide a better understanding of the unparalleled success of these two remarkable groups, of interspecific interactions in general, and ultimately of terrestrial biological communities.The Ecology and Evolution of Ant-Plant Interactions synthesizes the dynamics of ant-plant interactions, including the sources of variation in their outcomes. Victor Rico-Gray and Paulo S. Oliveira capture both the emerging appreciation of the importance of these interactions within ecosystems and the developing approaches that place studies of these interactions into a broader ecological and evolutionary context. The collaboration of two internationally renowned scientists, The Ecology and Evolution of Ant-Plant Interactions will become a standard reference for understanding the complex interactions between these two taxa.

Self-styled adventurer, literary wit, philosopher, and statesman of science, Pierre-Louis Moreau de Maupertuis (1698-1759) stood at the center of Enlightenment science and culture. Offering an elegant and accessible portrait of this remarkable man, Mary Terrall uses the story of Maupertuis's life, self-fashioning, and scientific works to explore what it meant to do science and to be a man of science in eighteenth-century Europe.Beginning his scientific career as a mathematician in Paris, Maupertuis entered the public eye with a much-discussed expedition to Lapland, which confirmed Newton's calculation that the earth was flattened at the poles. He also made significant, and often intentionally controversial, contributions to physics, life science, navigation, astronomy, and metaphysics. Called to Berlin by Frederick the Great, Maupertuis moved to Prussia to preside over the Academy of Sciences there. Equally at home in salons, cafs, scientific academies, and royal courts, Maupertuis used his social connections and his printed works to enhance a carefully constructed reputation as both a man of letters and a man of science. His social and institutional affiliations, in turn, affected how Maupertuis formulated his ideas, how he presented them to his contemporaries, and the reactions they provoked.Terrall not only illuminates the life and work of a colorful and important Enlightenment figure, but also uses his story to delve into many wider issues, including the development of scientific institutions, the impact of print culture on science, and the interactions of science and government. Smart and highly readable, Maupertuis will appeal to anyone interested in eighteenth-century science and culture.”Terrall's work is scholarship in the best sense. Her explanations of arcane 18th-century French physics, mathematics, astronomy, and biology are among the most lucid available in any language.”-Virginia Dawson, American Historical ReviewWinner of the 2003 Pfizer Award from the History of Science Society

The first Europeans to set foot on North America stood in awe of the natural abundance before them. The skies were filled with birds, seas and rivers teemed with fish, and the forests and grasslands were a hunter's dream, with populations of game too abundant and diverse to even fathom. It's no wonder these first settlers thought they had discovered a paradise of sorts. Fortunately for us, they left a legacy of copious records documenting what they saw, and these observations make it possible to craft a far more detailed evocation of North America before its settlement than any other place on the planet.Here Steve Nicholls brings this spectacular environment back to vivid life, demonstrating with both historical narrative and scientific inquiry just what an amazing place North America was and how it looked when the explorers first found it. The story of the continent's colonization forms a backdrop to its natural history, which Nicholls explores in chapters on the North Atlantic, the East Coast, the Subtropical Caribbean, the West Coast, Baja California, and the Great Plains. Seamlessly blending firsthand accounts from centuries past with the findings of scientists today, Nicholls also introduces us to a myriad cast of characters who have chronicled the changing landscape, from pre-Revolutionary era settlers to researchers whom he has met in the field.A director and writer of Emmy Award-winning wildlife documentaries for the Smithsonian Channel, Animal Planet, National Geographic, and PBS, Nicholls deploys a cinematic flair for capturing nature at its most mesmerizing throughout. But Paradise Found is much more than a celebration of what once was: it is also a reminder of how much we have lost along the way and an urgent call to action so future generations are more responsible stewards of the world around them. The result is popular science of the highest order: a book as remarkable as the landscape it recreates and as inspired as the men and women who discovered it.

Arguably the most influential document in the history of urban planning, Daniel Burnham's 1909 Plan of Chicago, coauthored by Edward Bennett and produced in collaboration with the Commercial Club of Chicago, proposed many of the city's most distinctive features, including its lakefront parks and roadways, the Magnificent Mile, and Navy Pier. Carl Smith's fascinating history reveals the Plan's central role in shaping the ways people envision the cityscape and urban life itself.?Smith's concise and accessible narrative begins with a survey of Chicago's stunning rise from a tiny frontier settlement to the nation's second-largest city. He then offers an illuminating exploration of the Plan's creation and reveals how it embodies the renowned architect's belief that cities can and must be remade for the better. The Plan defined the City Beautiful movement and was the first comprehensive attempt to reimagine a major American city. Smith points out the ways the Plan continues to influence debates, even a century after its publication, about how to create a vibrant and habitable?urban environment.?Richly illustrated and incisively written, his insightful book will be indispensable to our understanding of Chicago, Daniel Burnham, and the emergence of the modern city.

Covers models from 1990 to 1995. Covering: short & long wheelbase, Van, Caravelle, Bus, 2.0 & 2.5-litre petrol and 1.9 & 2.4-litre diesel engines, clutch, suspension, fuel, ignition, steering, braking, electrics, bodywork, plus a fault-finding section. Covers manual only.

I have a truly marvellous demonstration of this proposition which this margin is too narrow to contain.' It was with these words, written in the 1630s, that Pierre de Fermat intrigued and infuriated the mathematics community. For over 350 years, proving Fermat's Last Theorem was the most notorious unsolved mathematical problem, a puzzle whose basics most children could grasp but whose solution eluded the greatest minds in the world. In 1993, after years of secret toil, Englishman Andrew Wiles announced to an astounded audience that he had cracked Fermat's Last Theorem. He had no idea of the nightmare that lay ahead. In 'Fermat's Last Theorem' Simon Singh has crafted a remarkable tale of intellectual endeavour spanning three centuries, and a moving testament to the obsession, sacrifice and extraordinary determination of Andrew Wiles: one man against all the odds.

A wealth of restoration tips and techniques covering E12, E24, E28, E34, 5 and 6 Series BMWs built between 1972 and 1995. Covers all models from 518 to M6. Advice is given on acquiring a good 5 & 6 Series model, plus tips on restoring, engines, bodywork, trim, electrics, suspension & much more.

Easy to follow step by step instructions & advice which enables the owner to carry out many jobs himself for the Mercedes-Benz Sprinter Van & Camper Diesel. Models covered: 208 CDI, 308 CDI, 211 CDI, 311 CDI, 411 CDI, 213 CDI, 313 CDI, 413 CDI, 216 CDI, 316 CDI, 416 CDI with the 2.2 & 2.7 litre CDI Diesel (types 611 DELA & 612 DELA) From 2000 to 2006 with the commom rail injection system. A total of 232 fully illustrated pages.

Covers all T4 diesel vehicles from 2000 to the end of 2004, including Vans 800, 1,000, and 1,200, Caravelle CL and GL, Bus (long and short wheelbase). Engines covered: Diesel 1.9L, 2.4L & 2.5L TDI, with a manual gearbox only. 164 large pages including 11 pages of wiring & over 200 illustrations.

‘A manual for the new, healthy way of being dirty … Read it, and you will learn to love your microbiota’ Newsweek Obesity, autism, mental health problems, IBS, allergies, auto-immunity, cancer. Does the answer to the modern epidemic of ‘Western’ diseases lie in our gut? You are 10% human. For every one of your cells, there are nine impostors hitching a ride. You are not just flesh and bone, but also bacteria and fungi. And you are more ‘them’ than you are ‘you’. Your gut alone hosts 100 trillion of them and until recently we thought that our microbes didn’t matter. This is all set to change as the latest scientific research tells a very different story, one where microbes run our bodies and becoming healthy is impossible without them. In this ground-breaking book, biologist Alanna Collen reveals how our personal colony of microbes influence our weight, immune system, mental health and even our choice of partner. This is a new way of understanding modern diseases – obesity, autism, mental health problems, gut disorders, allergies, auto-immunity and even cancer – as she argues they have their root in our failure to cherish our most fundamental and enduring relationship: that with our microbes. Illuminating many of the questions still unanswered by the human genome project 10% Human completely changes our understanding of diet, modern disease and medicine. The good news is that unlike our human cells, we can change our microbes for the better and this book shows you how. A revelatory and indispensable guide: life – and your body – will never seem the same again.

Discover the secret hints, tips and winning ways of the BANANAGRAMS? bunch! This little book contains the insider secrets to help you become Top Banana … Packed with curious words and fascinating facts, the Collins Little Book of Bananagrams? is a treasure in itself. It's the perfect gift for word lovers and BANANAGRAMS? players of all ages the world over, and includes: Dozens of proper nouns that you CAN play – in any word game! Three ways to turn tiles that save VITAL seconds How to use UK & US spellings to IMPROVE your game The one thing you MUST do in your first move 19 games you can play with BANANAGRAMS? tiles The ESSENTIAL tip that buys time whenever you call "PEEL!" A dictionary of WEORDS?: Weird Words That Win Word Games … And DOZENS of other top tips to boost your BANANAGRAMS? playing power! Over 6 million copies of the game sold.

The object of this work is to present to the student of medicine and the practitioner removed from the schools, a series of dissections demonstrative of the relative anatomy of the principal regions of the human body. Whatever title may most fittingly apply to a work with this intent, whether it had better be styled surgical or medical, regional, relative, descriptive, or topographical anatomy, will matter little, provided its more salient or prominent character be manifested in its own form and feature. The work, as I have designed it, will itself show that my intent has been to base the practical upon the anatomical, and to unite these wherever a mutual dependence was apparent.That department of anatomical research to which the name topographical strictly applies, as confining itself to the mere account of the form and relative location of the several organs comprising the animal body, is almost wholly isolated from the main questions of physiological and transcendental interest, and cannot, therefore, be supposed to speak in those comprehensive views which anatomy, taken in its widest signification as a science, necessarily includes. While the anatomist contents himself with describing the form and position of organs as they appear exposed, layer after layer, by his dissecting instruments, he does not pretend to soar any higher in the region of science than the humble level of other mechanical arts, which merely appreciate the fitting arrangement of things relative to one another, and combinative to the whole design of the form or machine of whatever species this may be, whether organic or inorganic. The descriptive anatomist of the human body aims at no higher walk in science than this, and hence his nomenclature is, as it is, a barbarous jargon of words, barren of all truthful signification, inconsonant with nature, and blindly irrespective of the cognitio certa ex principiis certis exorta. Still, however, this anatomy of form, although so much requiring purification of its nomenclature, in order to clothe it in the high reaching dignity of a science, does not disturb the medical or surgical practitioner, so far as their wants are concerned. Although it may, and actually does, trammel the votary who aspires to the higher generalizations and the development of a law of formation, yet, as this is not the object of the surgical anatomist, the nomenclature, such as it is, will answer conveniently enough the present purpose. The anatomy of the human form, contemplated in reference to that of all other species of animals to which it bears comparison, constitutes the study of the comparative anatomist, and, as such, establishes the science in its full intent. But the anatomy of the human figure, considered as a species, per se, is confessedly the humblest walk of the understanding in a subject which, as anatomy, is relationary, and branches far and wide through all the domain of an animal kingdom. While restricted to the study of the isolated human species, the cramped judgment wastes in such narrow confine; whereas, in the expansive gaze over all allying and allied species, the intellect bodies forth to its vision the full appointed form of natural majesty; and after having experienced the manifold analogies and differentials of the many, is thereby enabled, when it returns to the study of the one, to view this one of human type under manifold points of interest, to the appreciation of which the understanding never wakens otherwise. If it did not happen that the study of the human form (confined to itself) had some practical bearing, such study could not deserve the name of anatomical, while anatomical means comparative, and whilst comparison implies inductive reasoning. ? ABOUT AUTHOR: Joseph Maclise:FELLOW OF THE ROYAL COLLEGE OF SURGEONS I INSCRIBE THIS WORK TO THE GENTLEMENWITH WHOM AS A FELLOW-STUDENT I WAS ASSOCIATED AT THELondon University College: AND IN AN ESPECIAL MANNER, IN THEIR NAME AS WELL AS MY OWN,I AVAIL MYSELF OF THE OPPORTUNITY TO RECORD, ON THIS PAGE,ALBEIT IN CHARACTERS LESS IMPRESSIVE THAN THOSE WHICH AREWRITTEN ON THE LIVING TABLET OF MEMORY,THE DEBT OF GRATITUDE WHICH WE OWE TO THE LATE SAMUEL COOPER, F.R.S., AND ROBERT LISTON, F.R.S., TWO AMONG THE MANY DISTINGUISHED PROFESSORS OF THATINSTITUTION, WHOSE PUPILS WE HAVE BEEN,AND FROM WHOM WE INHERIT THAT BETTER POSSESSION THAN LIFEITSELF, AN ASPIRATION FOR THE LIGHT OF SCIENCE. JOSEPH MACLISE.

Mér? László korábbi nagy siker? k?nyvei komoly szellemi kalandot jelent?, gondolkodásra késztet?, ugyanakkor szórakoztató olvasmánynak bizonyultak. A Mindenki másképp egyforma 1999-ben elnyerte az ??v tudományos k?nyve Németországban” díjak egyikét. Mér? László új k?nyve a szerz? r?videbb, de nem kevésbé elmélyült, elgondolkodtató és szórakoztató írásait tartalmazza. Ezek t?bbsége a Magyar Narancs Egotrip rovatában jelent meg, a k?nyv címe azonos a szerz? ottani sorozatcímével. Ebben a k?nyvben a szerz? a legt?bb írást alaposan átdolgozta. A lényeg nemigen változott, de a szigorú újságcikk-m?faj szorításából kiszabadulva némelyik írás hosszabb, némelyik r?videbb lett – ahogy a téma kívánta. ?s hogy mi ez a talányos cím? A magyarázatot keresse a k?tetben! ?Eredeti szakmám matematikus, majd a m?szaki tudományokból kandidáltam, kés?bb pszichológiából lettem habilitált doktor, nemrég pedig a gazdaságpszichológia professzorává neveztek ki. Emellett k?zel húsz éve vezetek egy játékszoftver-fejleszt? céget, amelynek egyik alapítója vagyok. Tudományos szakcikkek mellett írtam néhány k?nyvet a szélesebb olvasók?z?nség számára is, ezek t?bb idegen nyelven is megjelentek. Az utóbbi években megszerettem a tárca m?faját is – ennek termését mutatja be ez a k?nyv.” Mér? László

Medicin? este un domeniu aflat ?ntr-o continu? schimbare, prin experien?a clinic? ?i studiile care l?rgesc mereu orizontul de cunoa?tere.Cartea de fa?? ?i ofer? viitorului asistent medical oportunitatea ?nsu?irii unor no?iuni de baz? din domeniul medicinii de laborator, la care se adaug? modalit??ile de prevenire ?i combatere a bolilor infec?ioase, precum ?i posibilit??ile actuale de tratare a acestora.Lucrarea comprim? ?i integreaz? informa?ii importante din domeniul virusologiei, bacteriologiei, parazitologiei, micologiei ?i imunologiei, fiecare dintre aceste ramuri cunosc?nd o dezvoltare independent? remarcabil? ?n ultimele decade.?ntregul material respect? programa de preg?tire a asisten?ilor medicali, adres?ndu-se tuturor elevilor ?colilor sanitare, indiferent de specialitate.

Geriatrie ?i geropatologie pentru asisten?i medicali vine ?n sprijinul elevilor ?colilor postliceale sanitare, la baza sa afl?ndu-se nevoia de cunoa?tere ?i perfec?ionare a viitorului asistent medical. Cre?terea demografic? a popula?iei v?rstnice impune o bun? cunoa?tere a particularit??ilor v?rstei a treia, at?t de publicul larg, c?t mai ales de personalul sanitar.Aceast? lucrare respect? programa de preg?tire a asisten?ilor medicali, ad?ug?nd ?i o serie de informa?ii care s? confere o perspectiv? unitar? asupra particularit??ilor fiziologice, patologice ?i terapeutice ale v?rstei a treia. Sunt abordate aspectele medico-sociale complexe ale procesului de ?mb?tr?nire, dar ?i evenimente cu un important r?sunet ?n via?a psiho-afectiv? a individului, precum pensionarea sau integrarea v?rstnicului ?n institu?ii specializate.Abordarea medico-psiho-social? a problematicii v?rstnicului ofer? o viziune integrat? a informa?iei, util? at?t elevilor ?colilor sanitare, c?t ?i asisten?ilor medicali. Totodat?, poate fi considerat un ?ndrumar util ?i studen?ilor facult??ilor de medicin? general? ?i farmacie, asisten?ilor sociali, psihologilor, medicilor de familie sau de alte specialit??i etc.

Aceast? carte, bazat? pe 20 de ani de cercetare clinic? ?i ?tiin?ific? ?n ce prive?te rolul apei ?n organism, prezint? descoperirea extraordinar? c? deshidratarea cronic? neinten?ionat? produce stres, dureri cronice ?i multe boli degenerative ?nso?ite de durere. Gura uscat? nu este singurul semn de deshidratare; este gre?it s? a?tepta?i p?n? vi se face sete. Ve?i afla care sunt semnalele emise de organism c?nd duce lips? de ap?. Corectarea aportului de ap? – da, de ap?! ap? natural?, c?t mai curat? – v? poate ajuta s? tr?i?i mai s?n?tos, bucur?ndu-v? de o via?? lipsit? de durere. Ve?i ?nv??a: cum s? preveni?i ?n mod natural boli precum astmul bron?ic, alergiile, hipertensiunea arterial?; cum s? ameliora?i durerile, inclusiv pirozisul, durerea de spate, durerea artritic?, durerea din colit? ?i migrenele; cum s? folosi?i apa pentru a preveni ?i combate ?mb?tr?nirea prematur?; cum s? elimina?i f?r? efort kilogramele ?n plus, natural ?i f?r? restric?ii alimentare.

HE who seeks to understand the character and achievement of Abraham Lincoln must begin with a study of the man’s honesty. At the base of his nature, in the tap-root and very fiber of his being, pulsed a fidelity to truth, whether of thought or of deed, peculiar to itself. So thoroughgoing was this characteristic that it seems to have begun in him where in other men it generally leaves off. Politicians without number have yielded a work-a-day obedience to the rules of honor, but there is record of no other public leader in recent times who, among the vicissitudes of a trying career, has endeav-ored to balance actions and principles with such painstaking nicety. To trace these efforts from Lincoln’s early years is to pass with him, pace for pace, over part of the road that led to distinction. As we go we shall have to take account of hap-penings, little as well as big; for every man is the sum of all his parts, and in no other way may we hope to comprehend how the esteem that began with a few rustic neighbors grew until it filled the heart of a nation. To what extent, if any, Lincoln inherited his uprightness of mind from remote ancestors will probably never be known. The bare lines of the genealogical chart afford no clues to the characters of the men and women whose names appear there. If any of the threads spun out of their several lives met and twined in the broad strand of blue that enriched his, there is no way of identifying the spinners. Less obscure, though per-haps of only passing interest, is what may be gleaned under this head about two of Lincoln’s nearer relations. His father’s brothers, Mordecai and Josiah, appear to have enjoyed general respect on account of their probity. “They were excellent men,” said one who claimed to know them intimately, “plain, moderately educated, candid in their manners and inter-course, and looked upon as honorable as any men I have ever heard of.”[i-1] Their younger brother Thomas, however, cannot be so readily portrayed. He has, like his illustrious son, been, in turn, depreciated and idealized to such a degree that the inquirer, who would reach safe conclusions in respect to him, must tread warily through a maze of contradictions. Rejecting the praise as well as the blame of hearsay histori-ans, and following the testimony of those only who knew the man, we learn from one that he was “honest”; from another that he “was regarded as a very honest man”; and still another found him “always truthful—conscientious.”[i-2] To these tributes must be added what one who was doubly connected with Thomas Lincoln had to say about him:—“I’m just tired of hearing Grandfather Lincoln abused,” said Mrs. Dowling, the daughter of Dennis Hanks and Matilda John-son, speaking to an attentive listener, not many years ago. “Everybody runs him down.”

"Un ghid absolut esen?ial pentru omenire. ?n?elepciunea pu?in cunoscut? care se reg?se?te ?n aceast? carte poate pune cap?t suferin?ei umane pe ?ntregul Glob, salv?nd oamenii de ravagiile pe care industria cancerului continu? s? le produc? din cauza ineficien?ei depline de care d? dovad?." – Mike Adams, Director al Laboratorului ?tiin?ific CWC Labs "Ty Bollinger ofer? pacien?ilor, oamenilor de ?tiin?? ?i celor care activeaz? ?n domeniul s?n?t??ii o explica?ie excelent? privitor la motivul pentru care viziunea actual? pe care o avem despre cancer este gre?it? ?i arat? ?n acela?i timp cum poate fi prevenit, prezent?nd o gam? larg? de op?iuni de tratament, care sunt mult mai eficiente ca raport risc-beneficii cost ?n compara?ie cu protocoalele de oncologie curente. Cartea de fa?? poate fi pentru tine un ghid valoros care s? te ajute s? previi sau chiar s? stopezi aceast? boal?. Cancerul poate fi ?nvins, iar Ty ne arat? cum." – Patrick Quillin, Ph.D., R.D., C.N.S., F.A.C.N., autor al lucr?rii ?Lupt? ?mpotriva cancerului prin alimenta?ie” "?Adev?rul despre cancer? este ghidul necesar pentru prevenirea, tratamentul ?i eradicarea cancerului folosindu-ne de leacurile oferite de Dumnezeu. ?n aceast? carte revolu?ionar?, Ty Bollinger dezv?luie o ?ntreag? gam? de metode naturale de amplificare a imunit??ii ?i de energizare a trupului pentru a ?nvinge cancerul. Cite?te aceast? carte! S-ar putea s?-?i salveze via?a." – Josh Ax, D.C., autor al lucr?rii ?Eat Dirt” "Cartea lui Ty, ?Adev?rul despre cancer?, este o adev?rat? revela?ie. Pe l?ng? faptul c? ofer? pacien?ilor speran?? pentru viitor, le pune de asemenea la dispozi?ie informa?iile ?i resursele necesare pentru prevenirea ?i combaterea cancerului. Primul pas spre s?n?tate este autovindecarea, iar aceast? carte este una dintre cele mai bune c?r?i de auto-vindecare de pe pia??." – Leigh Erin Connealy, M.D.

Renun?a?i la p?ine, nu mai m?nca?i cereale, abandona?i glutenul! Mesajul este c?t se poate de simplu – fugi de gluten ?i nu numai c? te vei sim?i mai bine, dar ?i vei face o favoare creierului. Aceast? teorie extrem de controversat?, care demonteaz? toate ipotezele nutri?ionale moderne, propulseaz? cartea lui Perlmutter pe primul loc ?n topul bestsellerurilor New York Time, ajuns? la al nou?lea tiraj ?i publicat? ?n 15 ??ri. Renumitul neurolog David Perlmutter dezv?luie un adev?r ?ngropat foarte mult timp ?n literatura de specialitate: carbohidra?ii distrug creierul. ?i nu numai carbohidra?ii nes?n?to?i, dar chiar ?i cei s?n?to?i, precum cerealele integrale care pot provoca demen??, ADHD, anxietate, migrene, depresie ?i multe altele. Dr. Perlmutter explic? mecanismele care au loc la nivelul creierului atunci c?nd acesta are de a face cu ingredientele comune din p?inea cea de toate zilele ?i din bolul cu fructe, de ce gr?simea ?i colesterolul sunt benefice pentru creier ?i cum pot stimula acestea regenerarea celular? la orice v?rst?. Oferind o privire ?n profunzime asupra felului ?n care putem prelua controlul ?genelor noastre inteligente“ prin alegeri specifice alimentare ?i de stil de via??, autorul demonstreaz? cum se pot fi ?nfr?nge cele mai de temut maladii ale noastre f?r? medicamente. ?n sus?inerea teoriilor expuse ?n prima parte a c?r?ii, dr. Perlmutter a definitivat un plan revolu?ionar de 4 s?pt?m?ni prin care ne ?nva?? cum s? reprogram?m destinul nostru genetic pentru ob?inerea performan?elor ?n ceea ce prive?te starea de s?n?tate. Concluzia este ?ncurajatoare – nu depinde dec?t de noi s? r?m?nem ?n deplin?tatea facult??ilor mintale p?n? la sf?r?itul vie?ii.

In 1861, Henry Dircks, a civil engineer, of London, published a work entitled "Perpetuum Mobile; or, Search for Self-Motive Power, During the Seventeenth, Eighteenth and Nineteenth Centuries." The book contains 599 pages, and was followed in 1870, by a second series by the same author entitled "Perpetuum Mobile, or a History of the Search for Self-Motive Power from the Thirteenth, to the Nineteenth Century." In these two books there is amassed a wonderful amount of material showing on the part of the author diligence, great patience and wide and thorough search.The author of these works was not enamoured of his subject, and his books clearly show that he was not writing them because of any interest he had in the subject of Perpetual Motion. On the contrary, they appear to have been written because of a deep detestation entertained by the author for the subject of Perpetual Motion, and a contemptuous pity for any one seriously interested in the subject. Mr. Dircks's works may be said to be the works of a scold. His sentiments were deep, and his impulses strong, which accounts for the vast amount of labor he did in the preparation of his books. Those books are now out of print, and it is believed by the author of this book that they may well remain so. They contain much material that no one would be justified in wading through. The most complicated mechanisms devised by enthusiastic dreamers are shown in the same detail with which the inventors described them in presenting them to the public, or to the patent offices. Little is to be gained by this. So complicated are many of the devices that only technically trained engineers could read them understandingly, and few technically trained engineers are now greatly interested in self-motive power devices. We believe that every useful or interesting purpose is served if enough devices are collected, classified and presented to show the various principles relied upon by the inventors; with an explanation of why they failed—i. e., wherein the principles relied upon are wrong, and while possibly not out of harmony with any mechanical principles then known, are entirely out of harmony with principles since discovered and now well known. In the preparation of this volume a vast amount of the information furnished by the two works of Mr. Dircks has been rearranged, reclassified, and used.Everyone who has to any extent, by environment, associated with the mass of people who are not technically educated, knows that the persons who are still interested in the subject of Perpetual Motion, and who still seek its attainment, are not technically trained engineers or mathematicians, but for the greater part untrained people of naturally strong mechanical sense, and of natural mechanical and mathematical adaptation.This book is written for the perusal of that large class of people. It is not designed as an argument either for or against the possibility of the attainment of Perpetual Motion. The author is content to classify and present—clearly, it is hoped—the leading endeavors that have been known in that field of effort, and to explain their failure. It is believed by the author that the perusal of the present volume by anyone whose mind has been attracted by the subject of Perpetual Motion will result in an enlightenment, and, it is also believed, will have a tendency to direct his mind from a struggle with theories long ago exploded, and may result in directing his efforts to things practical, and not without hope of attainment.This work is offered only to minds mechanically or mathematically inclined. It is not even hoped that it will interest people who prefer fiction to fact, nor people who read simply for idle entertainment. ABOUT AUTHOR: The author has no apology to offer for the production of this book. He has spent his life in environments that have brought him into constant contact with mechanics, artisans and laborers as well as professional men, engineers, chemists and technical experts of various types. He knows a great many men—young men, for the most part—are constantly working on the old, old problem of Perpetual Motion; that much money, and much time are being spent in search of a solution for that problem which all scientific and technical men tell us is impossible of solution.It is believed by the author that a classification and presentation of selected groups of the devices produced in the past by which it was by the inventor believed, self-motive power had been attained, will save much work in fields already thoroughly exploited.So far as the author knows no book on the subject has appeared since 1870. The various encyclopedias published contain articles on the subject, but they are necessarily brief, and not satisfying to young men who have become interested in the subject.

A Magyarország f?ldtana cím? k?nyv els?sorban az egyetemi szint? áttekint? f?ldtani oktatás számára készült tank?nyvként. Az elektronikus kiadás lehet?ségeit kihasználva a k?tet a legfrissebb ismereteket szintetizálja és ad hazánk f?ldtani felépítésér?l korszer? áttekintést, amelyet haszonnal forgathatják nemcsak egyetemi hallgatók, hanem a téma iránt érdekl?d? nem szakmabeliek egyaránt. A k?tet szerz?i, Budai Tamás és Konrád Gyula aktív és nagy tapasztalattal rendelkez? terepi geológusok, akik oktatási tapasztalatokkal egyaránt rendelkezve megfelel? arányban vegyítik a terepi tapasztalatokat az oktatás igényeivel.A megértést számos ábra teszi teljessé. (a Kiadó)