| TABLE OF CONTENTS. |
|---|
| I. | BIOGRAPHY.—Dr. Morell Mackenzie.—Biographical note and portrait of the great English laryngologist—the physician of the Prussian Crown Prince.—1 illustration. | 9794 |
| II. | BOTANY.—Soudan Coffee.—The Parkia biglobosa.—Its properties and appearance, with analyses of its beans.—8 illustrations. | 9797 |
| Wisconsin Cranberry Culture.—The great cranberry crop of Wisconsin.—The Indian pickers and details of the cultivation. | 9796 |
| III. | CHEMISTRY.—Analysis of Kola Nut.—A new article adapted as a substitute for cocoa and chocolate to military and other dietaries.—Its use by the French and German governments. | 9785 |
| Carbonic Acid in the Air.—By THOMAS C. VAN NUYS and BENJAMIN F. ADAMS, Jr.—The results of eighteen analyses of air by Van Nuys apparatus. | 9785 |
| The Crimson Line of Phosphorescent Alumina.—Note on Prof. Crooke's recent investigation of the anomalies of the oxide of aluminum as regards its spectrum. | 9784 |
| IV. | ELECTRICITY.—Electric Time.—By M. LITTMANN.—An abstruse research into a natural electric standard of time.—The results and necessary formulæ. | 9793 |
| New Method of Maintaining the Vibration of a Pendulum.—Ingenious magneto-electric method of maintaining the swinging of a pendulum. | 9794 |
| The Part that Electricity Plays in Crystallization.—C. Decharme's investigations into this much debated question.—The results of his work described.—3 illustrations. | 9793 |
| V. | ENGINEERING.—A New Type of Railway Car.—A car with lateral passageways, adapted for use in Africa—2 illustrations. | 9792 |
| Centrifugal Pumps at Mare Island Navy Yard, California.—By H.R. CORNELIUS.—The great pumps for the Mare Island dry docks.—Their capacity and practical working. | 9792 |
| Foundations of the Central Viaduct of Cleveland, O.—Details of the foundations of this viaduct, probably the largest of its kind ever constructed. | 9792 |
| VI. | METALLURGY.—Chapin Wrought Iron.—By W.H. SEARLES.—An interesting account of the combined pneumatic and mechanical treatment of pig iron, giving as product a true wrought iron. | 9785 |
