| TABLE OF CONTENTS. |
|---|
| I. | [CHEMISTRY AND METALLURGY.—Beeswax and its Adulterations. —Chemical ingredients.—Detection of adulterations.] | 7064 |
| [Phenol in the Stem, Leaves, and Cones of Pinus Sylvestris. —A discovery bearing on the flora of the Carboniferous epoch and the formation of petroleum.] | 7065 |
| [The School of Physics and Chemistry of Paris.—With engraving of laboratory.] | 7065 |
| [Some Relations of Heat to Voltaic and Thermo Electric Action of Metals in Electrolysis.—By G. GORE.] | 7070 |
| II. | [ENGINEERING, MECHANICS, ETC.—Air Refrigerating Machine.—5 figures.] | 7071 |
| [A Gas Radiator and Heater.] | 7071 |
| [Concrete Water Pipes.] | 7071 |
| [The Sellers Standard System of Screw Threads. Nuts, and Bolt Heads.—A table.] | 7072 |
| [An English Railway Ferry Boat.—3 figures.] | 7072 |
| [The Problem of Flight and the Flying Machine.] | 7072 |
| III. | [TECHNICAL.—Concrete Buildings for Farms.—How to construct them.] | 7063 |
| [What Causes Paint to Blister and Peel?—How to prevent it.] | 7063 |
| [Olive Oil.—Difficulties encountered in raising an olive crop.—Process of making Oil.] | 7064 |
| IV. | [ELECTRICITY. ETC.—Telephony and Telegraphy on the Same Wires Simultaneously.—4 figures.] | 7067 |
| [The Electric Marigraph.—An apparatus for measuring the height of the tide.—With engravings and diagrams showing the Siemens and Halske marigraph and the operation of the same.] | 7068 |
| [Delune & Co.'s System of Laying Underground Cables.—2 figures.] | 7069 |
| [Electricity Applied to Horseshoeing.—Quieting an unruly animal.—3 engravings.] | 7069 |
| [Esteve's Automatic Pile.—1 figure.] | 7070 |
| [Woodward's Diffusion Motor.] | 7070 |
| V. | [ASTRONOMY.—Lunar Heat.—Its reflected and obscure heat.—Trifling influence of the moon upon wind and weather.—By Prof. C.A. YOUNG.] | 7073 |
| VI. | [NATURAL HISTORY.—The Long-haired Pointer "Mylord." —With engraving.] | 7073 |
| VII. | [HORTICULTURE, ETC.—Apple Tree Borers.—Protection against the same.] | 7074 |
| [Keffel's Germinating Apparatus.—With engraving.] | 7074 |
| [Millet.—Its Cultivation.] | 7074 |
| VIII. | [MISCELLANEOUS.—Puerta del Sol, Madrid, Spain.—With engraving.] | 7063 |
| [Dust-free Spaces.—A lecture delivered by Dr. OLIVER J. LODGE before the Royal Dublin Society.] | 7067 |
