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قراءة كتاب Scientific American Supplement, No. 446, July 19, 1884

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‏اللغة: English
Scientific American Supplement, No. 446, July 19, 1884

Scientific American Supplement, No. 446, July 19, 1884

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دار النشر: Project Gutenberg
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SCIENTIFIC AMERICAN SUPPLEMENT NO. 446

NEW YORK, JULY 19, 1884

Scientific American Supplement. Vol. XVIII, No. 446.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS
I. CHEMISTRY.--Tin in Canned Foods.--By Prof. ATTFIELU.--Small amount of tin found.--Whence come these small particles.--No cause for alarm.
II. ENGINEERING AND MECHANICS.--The Windmill.--By JAMES W. HILL.--The Eclipse wind.--Other wind mills.--Their operation, use, etc.
The Pneumatic Dynamite Gun.--With engraving of pneumatic dynamite gun torpedo vessel.
Rope Pulley Friction Brake.--3 figures.
Wire Rope Towage.--Treating of the system of towage by hauling in a submerged wire rope as used on the River Rhine, boats employed, etc.--With engraving of wire rope tug boat.
Improved Hay Rope Machine.--With engraving.
The Anglesea Bridge, Cork.--With engraving.
Portable Railways.--By M DECAUVILLE.--Narrow gauge roads in Great Britain.--M. Decauvilie's system.--Railways used at the Panama Canal, in Tunis, etc.
III. TECHNOLOGY.--Improved Pneumatic Filtering Presses, and the Processes in which they are employed.--2 engravings.
Pneumatic Malting.
A New Form of Gas Washer.--Manner in which it is used.--By A. BANDSEPT.--2 figures.
IV. ELECTRICITY, HEAT, ETC.--Gerard's Alternating Current Machine.--2 engravings.
Automatic Fast Speed Telegraphy.--By THEO. F. TAYLOR.--Speed determined by resistance and static capacity.--Experiments Taylor's system.--With diagram.
Theory of the Action of the Carbon Microphone.--What is it? --2 figures.
The Dembinski Telephone Transmitter.--3 figures.
New Gas Lighters.--Electric lighters.--3 engravings.
Distribution of Heat which is developed by Forging.
V. ARCHITECTURE, ART. ETC.--Villa at Dorking.--An engraving.
Arm Chair in the Louvre Collection.
VI. GEOLOGY.--The Deposition of Ores.--By J.S. NEWBERRY.--Mineral Veins.--Bedded veins.--Theories of ore deposit.--Leaching of igneous rocks.
VII. NATURAL HISTORY, ETC.--Habits of Burrowing Crayfishes in the U.S.--Form and size of the burrows and mounds.--Obtaining food.--Other species of crayfish.--3 figures.
Our Servants, the Microbes.--What is a microbe?--Multiplication. --Formation of spores.--How they live.--Different groups of bacteria.--Their services.
VIII. HORTICULTURE.--A New Stove Climber.--(Ipomæa thomsoniana)
Sprouting of Palm Seeds.
History of Wheat.
IX. MISCELLANEOUS.--Technical Education in America.--Branches of study most prominent in schools of different States.
The Anæsthetics of Jugglers.--Fakirs of the Indies.--Processes employed by them.--Anæsthetic plants.
Epitaphium Chymicum.--An epitaph written by Dr. GODFREY.

IMPROVED FILTER PRESSES.

Hitherto it has been found that of all the appliances and methods for separating the liquid from the solid matters, whether it

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