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Issue Title

SCIENTIFIC AMERICAN SUPPLEMENT NO. 441

NEW YORK, JUNE 14, 1884

Scientific American Supplement. Vol. XVII, No. 441.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


TABLE OF CONTENTS.
I.CHEMISTRY AND METALLURGY.—On Electrolysis.—Precipitation of lead, thallium, silver, bismuth, manganese, etc.—By H. SCHUCHT
The Electro-Chemical Equivalent of Silver
Zircon.—How it can be rendered soluble.—By F. STOLBA
A New Process for Making Wrought Iron Directly from the Ore. —Comparison with other processes.—With descriptions and engravings of the apparatus used
Some Remarks on the Determination of Hardness in Water
On the changes which Take Place in the Conversion of Hay into Ensilage.—By F.J. Lloyd
II.ENGINEERING AND MECHANICS.—Faure's Machine for Decorticating Sugar Cane.—With full description and 13 figures
The Generation of Steam and the Thermodynamic Problems Involved.—By WM. ANDERSON.—Apparatus used in the experimental determination of the heat of combustion and the laws which govern its development.—Ingredients of fuel.—Potential energy of fuel.—With 7 figures and several tables
Planetary Wheel Trains.—Rotations of the wheels relatively to the train arm.—By Prof. C.W. MACCORD
The Pantanemone.—A New Windwheel.—1 engraving
Relvas's New Life Boat.—With engraving
Experiments with Double Barreled Guns and Rifles. —Cause of the divergence of the charge.—4 figures
Improved Ball Turning Machine.—1 figure
Cooling Apparatus for Injection Water.—With engraving
Corrugated Disk Pulleys.—1 engraving
III.TECHNOLOGY.—A New Standard Light
Dr. Feussner's New Polarizing Prism.—Points of difference between the old and new prisms.—By P.R. SLEEMAN
Density and Pressure of Detonating Gas
IV. ELECTRICITY, LIGHT, ETC.—Early History of the Telegrap
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