Scientific American Supplement, No. 821

限Scientific American Supplement, No. 821, Sep. 26, 1891

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Sep. 26, 1891, by Various This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net
Title: Scientific American Supplement, No. 821, Sep. 26, 1891
Author: Various
Release Date: October 5, 2004 [EBook #13640]
Language: English
Character set encoding: ISO-8859-1
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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.
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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
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[Illustration: INTERIOR OF THE NEW LABOR EXCHANGE, PARIS.]
[Illustration: NEW LABOR EXCHANGE, PARIS.]
THE NEW LABOR EXCHANGE, PARIS.
The new Labor Exchange is soon to be inaugurated. We give herewith a view of the entrance facade of the meeting hall. The buildings, which are the work of Mr Bouvard, architect, of the city of Paris, are comprised within the block of houses whose sharp angle forms upon Place de la Republique, the intersection of Boulevard Magenta and Bondy street. One of the entrances of the Exchange is on a level with this street. The three others are on Chateau d'Eau street, where the facade of the edifice extends for a length of one hundred feet. From the facade and above the balcony that projects from the first story, stand out in bold relief three heads surrounded by foliage and fruit that dominate the three entrance doors. These sculptures represent the Republic between Labor and Peace. The windows of the upper stories are set within nine rows of columns, from between the capitals of which stand out the names of the manufacturers, inventors, and statesmen that have sprung from the laboring classes. Upon the same line, at the two extremities of the facade, two modillions, traversed through their center by palms, bear the devices "Labor" and "Peace." Above, there is