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Scientific American Supplement, No. 648, June 2, 1888电子书

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作       者:Various

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出版时间:2018-02-27

字       数:22.7万

所属分类: 教育 > 外语 > 实用英语

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For a quarter of a century maritime nations have been continuously engaged in improving the mechanical appliances of their large ports. The use of tracks to bring goods to be placed on vessels as near as possible to the shipping point, the substitution of oblique moles for perpendicular ones in large docks, the creation of a hydraulic method of loading and unloading through movable cranes (which will perhaps in a near future cede to an electrical one), constitute the means most used for expediting transshipments and reducing the expense of them to a minimum. But, at the same time that the facilities for all kinds for handling packages have been increased, it has also become necessary to greatly increase the power of the machines applied to them. The construction of large packets now requires the putting in place of boilers of great weight, and the adoption of the huge pieces that compose the artillery of ironclads necessitates the use of force that has been unknown up to recent times.
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THE ONE HUNDRED AND TWENTY TON SHEARS OF THE PORT OF MARSEILLES.

THE DISTRIBUTION OF HYDRAULIC POWER IN LONDON.

TEST OF A WROUGHT IRON DOUBLE TRACK FLOOR BEAM.[1]

HYDRAULIC TUBE PRESS.

TIMBER, AND SOME OF ITS DISEASES.[2] By H. Marshall Ward.

III.—The Evolution of the Modern Mill.[3]

IMPROVED TORPEDO BOAT.

SCIENTIFIC APPARATUS AT THE MANCHESTER ROYAL JUBILEE EXHIBITION.

COLORED PHOTOGRAPHY.

FUTURE PROSPECTS FOR GAS COMPANIES.[4]

THE APPLICATION OF ELECTRICITY TO LIGHTING AND WORKING.[5]

EFFECT OF CHLORINE ON THE ELECTRO-MOTIVE FORCE OF A VOLTAIC COUPLE.[6]

THE WIMSHURST INFLUENCE MACHINE.

SANITATION IN MASSACHUSETTS.

THE CARE OF THE EYES.[8]

TUMORS OF THE BLADDER. DIAGNOSED BY MEANS OF THE ELECTRO-ENDOSCOPIC CYSTOSCOPE.

PAPILLOMATOUS TUMOR OF THE BLADDER, DEMONSTRATED BY MEANS OF LISTER'S ELECTRO-CYSTOSCOPE.

DISTANCE AND CONSTITUTION OF THE SUN.

CHANGES IN THE STELLAR HEAVENS.

THE COMMON DANDELION.

SYSTEMATIC RELATIONS OF PLATYPSYLLUS, AS DETERMINED BY THE LARVA.[12]

THE SPECTRA OF OXYGEN.

ON A THEORY CONCERNING THE SUDDEN LOSS OF MAGNETIC PROPERTIES OF IRON AND NICKEL.

POISON OF THE SOMALIS, EXTRACTED FROM THE WOOD OF THE OUABAIO.

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