| TABLE OF CONTENTS. |
|---|
| I. | [CHEMISTRY AND METALLURGY.—On Electrolysis.—Precipitation of lead, thallium, silver, bismuth, manganese, etc.—By H. SCHUCHT] |
| [The Electro-Chemical Equivalent of Silver] |
| [ Zircon.—How it can be rendered soluble.—By F. STOLBA] |
| [A New Process for Making Wrought Iron Directly from the Ore. —Comparison with other processes.—With descriptions and engravings of the apparatus used] |
| [Some Remarks on the Determination of Hardness in Water] |
| [On the changes which Take Place in the Conversion of Hay into Ensilage.—By F.J. Lloyd] |
| II. | [ENGINEERING AND MECHANICS.—Faure's Machine for Decorticating Sugar Cane.—With full description and 13 figures] |
| [The Generation of Steam and the Thermodynamic Problems Involved.—By WM. ANDERSON.—Apparatus used in the experimental determination of the heat of combustion and the laws which govern its development.—Ingredients of fuel.—Potential energy of fuel.—With 7 figures and several tables] |
| [Planetary Wheel Trains.—Rotations of the wheels relatively to the train arm.—By Prof. C.W. MACCORD] |
| [The Pantanemone.—A New Windwheel.—1 engraving] |
| [Relvas's New Life Boat.—With engraving] |
| [ Experiments with Double Barreled Guns and Rifles. —Cause of the divergence of the charge.—4 figures] |
| [Improved Ball Turning Machine.—1 figure] |
| [Cooling Apparatus for Injection Water.—With engraving] |
| [Corrugated Disk Pulleys.—1 engraving] |
| III. | [TECHNOLOGY.—A New Standard Light] |
| [Dr. Feussner's New Polarizing Prism.—Points of difference between the old and new prisms.—By P.R. SLEEMAN] |
| [Density and Pressure of Detonating Gas] |
| IV. | [ ELECTRICITY, LIGHT, ETC.—Early History of the Telegraph. —Pyrsia, or the system of telegraphy among the Greeks. —Communication by means of characters and the telescope. —Introduction of the magnetic telegraph between Baltimore and Washington] |
| [ The Kravogl Electro Motor and its Conversion Into a Dynamo Electric Machine.—5 figures] |
| [Bornhardt's Electric Machine for Blasting in Mines. —15 figures] |
| [Pritchett's Electric Fire Alarm.—1 figure] |
| [A Standard Thermopile] |
| [Telephonic Transmission without Receivers.—Some of the apparatus exhibited at the annual meeting of the French Society of Physics.—Telephonic transmission through a chain of persons] |
| [Diffraction Phenomena during Total Solar Eclipses.—By G.D. Hiscox] |
| V. | [BOTANY AND HORTICULTURE.—Gum Diseases in Trees.— Cause and contagion of the same] |
| [Drinkstone Park.—Trees and plants cultivated therein.— With 2 engravings] |
| VI. | [MEDICINE AND HYGIENE.—Miryachit.—A newly-discovered disease of the nervous system, and its analogues.—By WM. A. HAMMOND] |
| VII. | [MISCELLANEOUS.—Turkish Baths for Horses.—With diagram.] |
| [On The Arrangement Of Ground Conductors.] |
