| TABLE OF CONTENTS. |
|---|
| I. | BOTANY.—New Race of Dwarf Dahlias.—A new and valuable flowering plant, with portrait of the introducer.—1 illustration. |
| II. | CHEMISTRY.—Carbon in Organic Substances.—By J. MESSINGER.— An improved method of determining carbon by inorganic combustions.—1 illustration. |
| III. | CIVIL ENGINEERING.—A New Integrator.—By Prof. KARL PEARSON. M.A.—An apparatus for use for the engineer in working up areas, indicator diagrams, etc.—4 illustrations. |
| | Best Diameter of Car Wheels.—The size of car wheels from the standpoint of American engineering.—A plea for a moderate sized wheel. |
| | Improved Overhead Steam Traveling Crane.—A crane constructed for use in steel works.—Great power and range.—3 illustrations. |
| | Some Hints on Spiking Track.—A most practical article for telling exactly how to conduct the operation on the ground.—1 illustration. |
| IV. | ELECTRICITY.—Electrical Laboratory for Amateurs.—By GEO. M. HOPKINS.—A simple collection of apparatus for conducting a complete series of electrical experiments.—17 illustrations. |
| | The Action of the Silent Discharge on Chlorine.—How an electric discharge affects chlorine gas.—An important negative result. |
| V. | ETHNOLOGY.—Some Winnebago Arts.—An interesting article upon the arts of the Winnebago Indians.—A recent paper before the New York Academy of Sciences. |
| VI. | MEDICINE AND HYGIENE.—The Philosophy of Consumption. —By Dr. J.S. CHRISTISON.—A review of the present theories of consumption, and the role played in it by its bacillus. |
| VII. | MUSIC.—Spacing the Frets on a Banjo Neck.—By Prof. C.W. MACCORD.—A most practical treatment of this subject, with full explanations.—1 illustration. |
| VIII. | ORDNANCE.—High Explosives in Warfare.—By Commander F.M. BARBER, U.S.N.—An elaborate review of modern explosives in their applicability to ordnance, etc. |
| | The Experiments at the Annapolis Proving Grounds.—The recent tests at Annapolis described and illustrated.—Views of the projectiles, plates, etc.—3 illustrations. ...
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