| TABLE OF CONTENTS. |
|---|
| I. | [BOTANY.—A Century Plant in Bloom.—Interesting account of the recent blossoming of an Agave Americana at Auburn, N.Y.] | 8965 |
| [Alpine Flowers in the Pyrenees.—1 illustration.] | 8965 |
| II. | [CHEMISTRY.—Probable Isolation of Fluorine.—Decomposition of hydrofluoric acid by an electric current.—By M.H. MOISSAN.—Production of a new body, possibly fluorine, or perfluoride of hydrogen.] | 8963 |
| [The Determination of Nitric Acid by the Absorption of Nitric Oxide in a Standard Solution of Permanganate of Potash.— By H.N. MORSE and A.F. LINN. Full description of a new and important volumetric determination.—1 illustration.] | 8964 |
| [Water of Crystallization.—By W.W.J. NICOL, M.A., D.Sc.— Discussion of the state of water of crystallization in a salt in solution.] | 8964 |
| III. | [ENGINEERING.—Combustion, Fire Boxes, and Steam Boilers—By JOHN A. COLEMAN.—Address before the June Convention of the Master Mechanics' Association.] | 8953 |
| [Compound Hydraulic Presses.—Different forms of presses designed for pressing bales for shipment.—Very fully illustrated by 8 figures.] | 8951 |
| [Examination Papers in General Construction.—Eighty-six questions in engineering propounded by the civil service examiners of New York city.] | 8956 |
| IV. | [MEDICINE AND PHYSIOLOGY.—A New Apparatus for the Study of Cardiac Drugs.—By WILLIAM GILMAN THOMPSON, M.D.—Ingenious application of instantaneous photography to the study of heart movements.—Apparatus and views produced.—3 illustrations.] | 8966 |
| [Creosote a Specific for Erysipelas,—A new cure for this complaint.] | 8966 |
| V. | [METALLURGY.—Primitive Iron Manufacture.—Iron furnace and blowing apparatus in use in Bengal.—2 illustrations.] | 8962 |
| VI. | [MINING ENGINEERING.—The Catastrophe at Chancelade.— Application of photography to investigating mine disasters. —4 illustrations.] | 8962 |
| VII. | [MISCELLANEOUS.—Celebration of the 500th Anniversary of the University of Heidelberg. August, 1886.] | 8957 |
| [Useful Bags and How to Make Them.—Interesting paper on the trunk makers' art.—4 illustrations.] | 8960 |
| VIII. | [NAVAL ENGINEERING.—Atlantic Steamers.—By W. JOHN.— Exhaustive comparison of representative Atlantic liners and war ships.—3 illustrations.] | 8954 |
| [Jet Propellers.—Hydraulic propulsion of vessels.— Mathematical examination of this subject.] | 8951 |
| IX. | [ORDNANCE.—The New Army Gun.—Description of the 8-inch steel gun as manufactured at the West Point, N.Y., Foundry.—1 illustration.] | 8952 |
| X. | [PHYSICS.—A New Thermo Regulator.—1 illustration.] | 8959 |
| [Cohesion and Cohesion Figures.—By WILLIAM ACKROYD, F.I.C.—Laws of vortex rings examined, and relation of solubility to cohesion.] | 8963 |
| [Pipette for taking the Density of Liquids.—Apparatus and calculations for use.—1 illustration.] | 8959 |
| XI. | [TECHNOLOGY.—Impurities in Photographic Chemicals, and Tests for Same.—Table referred to in a paper read before the Birmingham Photographic Society by G.M. Jones, M.P.S.] | 8957 |
| [Molasses, how made.—Work on Plantations Graphically Described.] | 8961 |
| [Optical errors and human mistakes.—By ERNST GUNDLACH.—On the examination of optical glasses.—A paper read before the Buffalo meeting of the A.A.A.S.] | 8963 |
| [Soap.—By HENRY LEFFMANN, Ph.D.] | 8962 |
| [Somzee's New Gas Burners.—Interesting description of regenerative burners.—9 figures.] | 8958 |
| [The Clamond Gas Burner.—Of value as a supplement to the above named article, describing an incandescent burner. —1 illustration.] | 8959 |
| [Wood Oil.—A new industry worked on the large scale in Sweden.] | 8962 |
