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Scientific American Supplement, No. 821, September 26, 1891   By:

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[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 821

NEW YORK, September 26, 1891

Scientific American Supplement. Vol. XXXII, No. 821.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.

I. Architectural. The New Labor Exchange in Paris. With views of the interior and exterior of the building

II. Electrical. The Construction and Maintenance of Underground Circuits. By S.B. FOWLER. A comprehensive article, discussing at length the various devices for protecting underground circuits, methods of inserting the cables, etc.

III. Engineering. Railroads to the Clouds. Sketches of a number of mountain railroads

IV. Marine Engineering. The French Armored Turret Ship the Marceau. 1 engraving. A full description of the vessel, giving dimensions and cost

A Review of Marine Engineering during the Past Decade. A paper read before the Institution of Mechanical Engineers by Mr. Alfred Blechynben, of Barrow in Furness. This paper, which is continued from Supplement No. 820, treats on steam pipes, feed water heating, twin screws, etc.

V. Miscellaneous. The Little House. An article giving various hints about the arrangement and management of small dwellings, with special view to the best sanitary arrangements

Stilt Walking. A sketch, with engraving, of Sylvain Dornon, the stilt walker of Landes

Remains of a Roman Villa in England

Gum Arabic and its Modern Substitutes. A continuation of a paper by Dr. S. Rideal and W.E. Youle. With 26 tables

A New Method of Extinguishing Fires. Invented by George Dickson and David A. Jones, of Toronto, Canada. Apparatus designed to utilize a mixture of water and liquefied carbonic acid

VI. Medicine and Hygiene. The Hygienic Treatment of Obesity. By Dr. Paul Chebon. Methods of eating, drinking, and exercising for the purpose of reducing fat. An extended article, giving valuable information to people troubled with too much flesh

VII. Photography. Spectroscopic Determination of the Sensitiveness of Dry Plates. A full description of the new plan of Mr. G.F. WILLIAMS, for determining the sensitiveness of dry plates by the use of a small direct vision pocket spectroscope

VIII. Physics. A Physical Laboratory Indicator. By J.W. MOORE, of Lafayette College. 1 engraving. This is a modification of the old peg board adapted to use in the laboratory. It indicates the names of the members of the class, contains a full list of the experiments to be performed, refers the student to the book and page where information in reference to experiments or apparatus may be found, it shows what experiments are to be performed by each student at a given time, etc.

Cailletet's Cryogen. A description, with one engraving, of Mr. Cailletet's new apparatus for producing temperatures from 70 degrees to 80 degrees C., below zero, through the expansion of liquid carbonic acid

IX. Technology. The Manufacture of Roll Tar Paper. An extended article containing a historical sketch and full information as to the materials used and the methods of manufacture

Smokeless Gunpowder. By Hudson Maxim. A comprehensive article on the manufacture and use of smokeless gunpowder, giving a sketch of its history, and describing the methods of manufacture and its characteristics

Method of Producing Alcohol. A description of an improved process for making alcohol. Invented by Mr. Alfred Springer, of Cincinnati, Ohio

[Illustration: INTERIOR OF THE NEW LABOR EXCHANGE, PARIS... Continue reading book >>


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