The Project Gutenberg EBook of Scientific American Supplement, No. 484,
April 11, 1885, by Various

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Title: Scientific American Supplement, No. 484, April 11, 1885

Author: Various

Release Date: November 3, 2004 [EBook #13939]

Language: English

Character set encoding: ASCII

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[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 484

NEW YORK, APRIL 11, 1885

Scientific American Supplement. Vol. XIX, No. 484.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

* * * * *

TABLE OF CONTENTS.

I. ENGINEERING AND MECHANICS.--Bridge over the Blaauw
Krantz Ravine, Cape Colony.--2 engravings.

Torpedo Ships.

The Gas Engine.--By DUGALD CLERK.--Combustion engines.--First
cylinder and piston engine.--Watt's experiments.--First gas
engine.--Principles of the gas engine.

Rapid Construction of the Canadian Pacific Railway.--By E.T.
ABBOTT.

The Osgood Mammoth Excavator.--3 figures.

Capstan Navigation on the Volga.--4 figures.

Steamboat Equipment of War Vessels.--With engraving of winch
for raising and lowering torpedo boats.

Improved Steam Trap.--1 engraving.

II. TECHNOLOGY.--Critical Methods of Detecting Errors in Plane
Surfaces.--By JOHN A. BRASHEAR.--11 figures.

Photometric Standards.--9 figures.

Bleaching or Dyeing Yarns and Goods in Vacuo.--1 figure.

On the Moulding of Porcelain.--By CHAS. LAUTH.--Moulding by
pressure of the air.--Moulding by vacuum.--Drying the moulded
pieces.--2 figures.

Photo-Tricycle Apparatus.--1 figure.

A Photo Printing Light.--1 figure.

A New Actinometer.

Astronomical Photography.

Electricity as a Preventive of Scale in Boilers.

III. DECORATIVE ART.--Alphabet designed by Godfrey Sykes.--An
engraving.

Old Wrought Iron Gate.--An engraving.

IV. GEOLOGY.--The Organization and Plan of the United States
Geological