| TABLE OF CONTENTS. |
|---|
| I. | BIOGRAPHY.—CHARLES GOODYEAR.—Thelife and discoveries of the inventor of vulcanized India rubber,with portrait.—1 illustration |
| II. | BIOLOGY.—Can we Separate Animals fromPlants?—By ANDREW WILSON.—A debated point welldiscussed.—The bases on which distinctions must bedrawn |
| III. | ELECTRICITY.—A New Electric BallisticTarget.—A target for investigations of the velocity ofprojectiles, now in use at the United States Military Academy, WestPoint, N. Y.—1 illustration. |
| Electric Erygmascope.—An electriclighting apparatus for examining earth strata in bore holes forgeologists' and prospectors' use.—1 illustration |
| The Electro-Magnet.—By Prof. SILVANUSTHOMPSON.—Continuation of this exhaustive treatise, givingfurther details on special points of construction.—1illustrations |
| IV. | ENTOMOLOGY.—Potash Salts.—The useof potash salts as insecticides, with accounts ofexperiments |
| The Outlook for Applied Entomology.—ByDr. C.V. RILEY, U.S. entomologist.—The conclusion of Prof.Riley's lecture, treating of the branch of entomology with whichhis name is so honorably associated |
| V. | INSURANCE.—The Expense Margin in LifeInsurance.—Elaborate review of the necessary expenses ofconducting the insurance of lives, with tables andcalculations |
| VI. | MATHEMATICS.—The Trisection of AnyAngle.—By FREDERIC R. HONEY, Ph.B.—A very ingeniousdemonstration of this problem, based on the properties of conjugatehyperbolas |
| VII. | METEOROLOGY.—Note on the Mt. BlancMeteorological Station |
| The Flood at Karlsbad.—Account of therecent flood and of its destructive effects.—1illustration |
| VIII. | MECHANICAL ENGINEERING.—Station forTesting Agricultural Machines.—A proposed establishment forapplying dynamometer tests to agricultural machines.—1illustration |
| Steam Engine Valves.—By THOMASHAWLEY.—A review of modern slide valve practice, the lap,cut-off, and other points.—6 illustrations |
| IX. | MISCELLANEOUS.—Science in theTheater.—Curious examples of stage effect in fictitiousmesmerizing a ...
Sitemize Üyelik ÜCRETSİZDİR! |
