The Project Gutenberg EBook of Scientific American Supplement, No. 520,
December 19, 1885, by Various

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Title: Scientific American Supplement, No. 520, December 19, 1885

Author: Various

Release Date: September 8, 2004 [EBook #13401]

Language: English

Character set encoding: ASCII

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[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 520

NEW YORK, DECEMBER 19, 1885

Scientific American Supplement. Vol. Vol. XX, No. 520.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

* * * * *

TABLE OF CONTENTS.

I. ENGINEERING, ETC.--Steel Structures.--Best use of different
grades of steel.--From a paper by Mr. JAS. CHRISTIE.

Natural Gas Fuel and its Application to Manufacturing:
Purposes.--Paper read before the Iron and Steel Institute by
Mr. ANDREW CARNEGIE.--First use of the gas.--Wells near
Pittsburg.--Extent of territory underlain with gas.--Cost of
piping.--Analyses ofnatural gas.

A Gas Engine Water Supply Alarm.--1 figure.

The Water Supply of Ancient Roman Cities.--An address by
Prof. W.H. CORFIELD.--Aqueducts for the supply of
Borne.--The aqueduct bridge Pont du Gard.--The supply of
Lyons.--Construction of underground aqueducts.

Steam Engine Economy.--By Chief Engineer J. LOWE,
U.S.N.--With diagram.

The "Elastic Limit" in Metals.--Selection of wire for
suspension bridges, etc.

Prices of Metals in 1874 and 1884.--With table.

II. TECHNOLOGY.--A Method of Measuring the Absolute Sensitiveness
of Photographic Dry Plates.--By Wm. H. PICKERING.--From the
proceedings of the Academy of Arts and Sciences.

Soldering and Repairing Platinum Vessels in the
Laboratory.--By J.W. PRATT.

The Helicoidal or Wire Stone Saw invented by M.P. GAY.--With
engraving of quarry showing application of saw, and 5 figures.

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