The Project Gutenberg EBook of Scientific American Supplement, No. 483,
April 4, 1885, by Various

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Title: Scientific American Supplement, No. 483, April 4, 1885

Author: Various

Release Date: November 20, 2004 [EBook #14097]

Language: English

Character set encoding: ASCII

*** START OF THIS PROJECT GUTENBERG EBOOK SCIENTIFIC AMERICAN ***

Produced by Don Kretz, Juliet Sutherland, Charles Franks and the DP Team

[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 483

NEW YORK, APRIL 4, 1885

Scientific American Supplement. Vol. XIX, No. 483.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

* * * * *

TABLE OF CONTENTS.

I. CHEMISTRY AND METALLURGY.--The Determination of
Graphite in Minerals.--By J.B. MACKINTOSH.

Sulphocyanide of Potassium.

Sugar Nitro-glycerine.

On Remelting of Cast Iron.

The Hardness of Metals.

II. ENGINEERING, ETC.--The Jet Ventilator. 4 figures.
Feeding Boilers at the Bottom. 2 figures.

The Honigmann Fireless Engine.--The fireless working of steam
engines by means of a solution of hydrate of soda.--With
several figures and diagrams.

Simple Methods of Calculating Stress in Girders.--By CH. LEAN.--With
full page of illustrations.

A Spring Motor.

Steam Yachts.

III. TECHNOLOGY.--Foucault's Apparatus for Manufacturing
Illuminating Gas and Hydrogen. 2 figures.

The Circle Divider.

Soluble Glass.--Process of manufacture.--Use.

Iron Printing and Microscopic Photography.--Formulas for
printing solutions.--Compound negatives.

Practical Directions for Making Lantern Transparencies.--By
T.N. ARMSTRONG.

Casting Chilled Car Wheels. 6 figures.

IV. ELECTRICITY, ETC.--Electricity and Prestidigitation.
2 figures.

Portable Electric Safety Lamp. 6 figures.

The Electric Discharge and Spark Photographed Directly without
an Objective. 6 engravings.

V. PHYSICS, ETC.--The True Constant of Gravity.