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 theBlaauw Krantz Ravine, Cape Colony.—2 engravings.
Torpedo Ships.
The Gas Engine.—By DUGALDCLERK.—Combustion engines.—First cylinder and pistonengine.—Watt's experiments.—First gasengine.—Principles of the gas engine.
Rapid Construction of the Canadian PacificRailway.—By E.T. ABBOTT.
The Osgood Mammoth Excavator.—3figures.
Capstan Navigation on the Volga.—4figures.
Steamboat Equipment of War Vessels.—Withengraving of winch for raising and lowering torpedo boats.
Improved Steam Trap.—1 engraving.
II.
TECHNOLOGY.—Critical Methods of DetectingErrors in Plane Surfaces.—By JOHN A. BRASHEAR.—11figures.
Photometric Standards.—9 figures.
Bleaching or Dyeing Yarns and Goods inVacuo.—1 figure.
On the Moulding of Porcelain.—By CHAS.LAUTH.—Moulding by pressure of the air.—Moulding byvacuum.—Drying the moulded pieces.—2 figures.
Photo-Tricycle Apparatus.—1figure.
A Photo Printing Light.—1 figure.
A New Actinometer.
Astronomical Photography.
Electricity as a Preventive of Scale inBoilers.
III.
DECORATIVE ART.—Alphabet designed byGodfrey Sykes.—An engraving.
Old Wrought Iron Gate.—Anengraving.
IV.
GEOLOGY.—The Organization and Plan of theUnited States Geological Survey.—By J.W. POWELL.—Atopographic map of the UnitedStates.—Paleontology.—Chemistry.—Physicalresearches.—Statistics.—Library.—Publications.—Generalgeology.—Economic geology.—Relation of the generalsurvey to the State survey.
V.
BOTANY, ETC.—The Sunflowers.—Annuals,perennials, etc.—11 engravings.<
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