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Scientific American Supplement, No. 392, July 7, 1883电子书

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作       者:Various

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出版时间:2018-02-27

字       数:19.4万

所属分类: 教育 > 外语 > 实用英语

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The continuous current and the alternating current generators invented by Dr. J. Hopkinson and Dr. Alexander Muirhead are peculiarly interesting as being probably the first in which the bobbins of the armature were wound with copper ribbon and arranged on a disk armature much in the same way as was afterward done by Sir William Thomson and by Mr. Ferranti. In the Muirhead-Hopkinson machine the armature coils are attached to a soft iron ring, whereas in the Ferranti the iron core is dispensed with, and a gain of lightness in the armature or rotating part effected; this advantage is of considerable importance, though Messrs. Hopkinson and Muirhead can of course reduce the weight of this iron core to insignificant proportions.
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IMPROVED DYNAMO MACHINE.

AN IMPROVED MANGANESE BATTERY.

THE CAUSE OF EVIDENT MAGNETISM IN IRON, STEEL, AND OTHER MAGNETIC METALS.

THE WESTINGHOUSE BRAKE.

HYDRAULIC ELEVATORS AND MOTORS.

WATER SUPPLY OF SMALL TOWNS.

IMPROVED WATER METER.

WASHING MACHINE FOR WOOL.

INCREASING THE ILLUMINATING POWER OF GASES, ETC.

PREVENTING IRON FROM RUSTING.

AN ELASTIC MASS FOR CONFECTIONERS' USE.

CAOUTCHOUC.

PHOTOGRAPHIC ACTION STUDIED SPECTROSCOPICALLY.

SALT AND LIME.

RENEWING PAINT WITHOUT BURNING.

TESTING OLIVE OIL.

ON THE THEORY OF THE FORMATION OF COMPOUND ETHERS.

A GREEN OR GOLDEN COLOR FOR ALL KINDS OF BRASS.

VINEGAR.

THE ALIZARINE INDUSTRY.

THE PRESERVATION OF MEAT BY CARBONIC ACID.

REDUCTION OF OXIDIZED IRON BY CARBONIC OXIDE.

ON THE ADULTERATION OF SOAP.

BOVINE AND HUMAN MILK: THE DIFFERENCE IN ITS ACTION AND COMPOSITION.

CEREAL FOODS IN THEIR RELATION TO HEALTH AND DISEASE.

MOIST AIR IN LIVING ROOMS.

THE DEVELOPMENTAL SIGNIFICANCE OF HUMAN PHYSIOGNOMY.

THE PRODUCTION OF FIRE.

ST. BLAISE, THE WINNER OF THE DERBY.

SCIENTIFIC PROGRESS IN CHINA AND JAPAN.

THE DIAMOND FIELDS OF SOUTH AFRICA.

SPONGES AT THE BAHAMAS.

TESTING FISH OVA FOR IMPREGNATION.

THE SCIENTIFIC AMERICAN SUPPLEMENT.

PATENTS.

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