| 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.] |
| [Lye's Fuchsias.—1 engraving.] |
| VI. | [HYGIENE, ETC.—Brief Sanitary Matters inConnection with Isolated Country Houses.—By E.W.BOWDITCH.] |
| [Sanitary Cooking.—By V.L.OPPENHEIMER.] |
| [Time required to digest Different Foods.] |
