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TUNGSTEN LAMPS

G. S. Merrill

Vol. xxix-1910, pp. 1709-1729 Description of the general method of manufacturing and of the performance characteristics of the tungsten lamps. Explanation of the heat efficiency of this type of lamp.

No discussion.

19. ELECTRICITY IN THE ARMY AND NAVY

CIVILIAN CO-OPERATION IN THE DEVELOPMENT OF ELECTRICAL DEFENSES FOR MILITARY PURPOSES

Caryl D. Haskins

Vol. xix-1902, pp. 559-562 Brief mention of some of the uses of electricity in the army, indicating the field in which the civilian engineer could be of most service in case

of an emergency.

Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defense."

ELECTRICITY IN ITS APPLICATION TO SUBMARINE MINES Capt. John Stephen Sewell Vol. xix-1902, pp. 563-568 General discussion of the requirements of electrically operated mines, bringing out the difficulties encountered in the design of such systems. Discussion, incorporated with that of paper by Louis Bell on “Emergency Engineering for Harbor Defence."

WIRELESS TELEGRAPHY IN THE UNITED STATES NAVY Lieut. A. M. Beecher Vol. xix-1902, pp. 569-578 Description of the general principles of wireless telegraph systems and account of what has actually been done in the navy.

Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

Lieut. Harry George

ELECTRICITY IN THE NAVY

Vol. xix-1902, pp. 579-628

General description of the applications of electricity on board war ships, with brief outline of the specifications for the generating, wiring and apparatus plant-construction, properties and acceptance tests, as well as the power requirements and mode of operation of various special apparatus such as ammunition hoists, turrets, signal lights and telegraphs,

etc.

Discussion, included with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

THE REASONS FOR THE CHANGE OF THE NAVY STANDARD VOLTAGE
FROM 80 TO 125

Lieut. W. V. N. Powelson

Vol. xix-1902, pp. 643-664 History of voltages used in the navy. Table showing relative costs and weights of wiring materials for operation at 80 volts and at 125 volts.

Detailed discussion of the reasons for adopting 125 volts as the navy standard.

Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

ELECTRICITY IN PROMINENT SEA COAST DEFENCES

Major Geo. W. Goethals Vol. xix-1902, pp. 665-683 Description of the general character and arrangement of sea coast forts, giving the requirements and characteristics of the electric service, also the considerations which enter into the drawing up of specifications for the electric equipment of such plants.

Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

SUB-MARINE CABLE TESTING IN THE SIGNAL CORPS U. S. ARMY

Vol. xix-1902, pp. 685-695

General description of the electrical and mechanical specifications for Signal Corps cable and the tests which it must undergo. Change of insulation resistance with temperature treated in detail, and a chart given for reducing resistances to standard temperatures.

Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

ELECTRICITY IN THE NAVY

Walter M. McFarland

Vol. xix-1902, pp. 697-705 Brief general review of the uses of electricity in the navy. Criticism of the low temperature limit required by navy specifications. Advantages of alternating current for use on board ship and in navy yards. Discussion, incorporated with that of paper by Louis Bell on "Emergency Engineering for Harbor Defence."

Lieut. Col. Samuel Reber

ELECTRICITY IN THE SIGNAL CORPS

Vol. xix-1902, pp. 707-724 Scope of the duties of the Army Signal Corps. Telegraph and telephone construction in the field and in fortresses. Detailed description of signal apparatus used in the army.

Discussion, incorporated with that of paper by Louis Bell on “Emergency Engineering for Harbor Defence."

Louis Bell

EMERGENCY ENGINEERING FOR HARBOR DEFENCE

Vol. xix-1902, pp. 725-733 Account of experiences of the Volunteer Electrical Corps formed at Boston during the Spanish War for the construction of mining defences. Discussion (including that of paper by Carl B. Haskins on “Civilian Coöperation in the Development of Electrical Defences for Military Purposes," by Captain John Stephen Sewell on "Electricity in Its Application to Submarine Mines;" paper by Lieutenant A. M. Beecher on "Wireless Telegraphy in the U. S. Navy;" paper by Lieutenant Harry George on "Electricity in the Navy;" paper by Captain Edgar Russel on "Military Cable System of the Fhilippines;" paper by Lieutenant W. V. N. Powelson on "The Reasons for the Change of the Navy Standard

Voltage from 80 to 125," by Major George W. Goethals on "Electricity in Prominent Sea Coast Defences;" paper by Townsend Wolcott on "Submarine Cable Testing in the Signal Corps,-U. S. Army;" paper by Walter M. McFarland on "Electricity in the Navy," and by Lieutenant Colonel Samuel Reber on "Electricity in the Signal Corps"), pp. 734-742, by Messrs. Samuel Reber, Harry George, Eugene Griffin, A. V. Abbott, A. M. Beecher, A. W. Greely, Calvin W. Rice, and George T. Hanchett. Defence of the navy specifications. General discussion of wireless telegraphy.

20. MISCELLANEOUS APPLICATIONS OF ELECTRICITY

A. ELECTROCHEMISTY AND METALLURGY

Samuel Sheldon

THE ELECTROCHEMICAL INDUSTRIES

Vol. xix-1902, pp. 281-294 Brief description of various commercial electro-chemical processes— electro-deposition of metals; production of organic and inorganic substances; process involving the use of electric furnaces. Also brief description of electrolytic condensers, rectifiers and interrupters.

Discussion, incorporated with that of paper by W. R. Whitney on "Colloids."

THE ELECTRIC FURNACE IN INDUSTRIAL CHEMISTRY

Chas. B. Jacobs Vol. xix-1902, pp. 295-307 Description of several important processes carried on with electric furnaces, and discussion of the characteristics and properties of carbides and silicides.

Discussion, incorporated with that of paper by W. R. Whitney on "Colloids."

Carl Hering

ELECTROLYTIC CONDUCTION WITHOUT ELECTRODES

Vol. xix-1902, pp. 309-315 Theoretical discussion of possible methods of producing and measuring electric current in a purely liquid conductor.

Discussion, incorporated with that of paper by W. R. Whitney on “Colloids."

LOW GRADE ORES;

N. S. Keith

Vol. xix-1902, pp. 333-341

Description of a process and plant for recovering copper from ores of an old mine near New York City.

Discussion, incorporated with that of paper by W. R. Whitney on "Colloids."

ON THE MODIFICATIONS IN HERING'S LAWS OF FURNACE ELECTRODES
INTRODUCED BY INCLUDING VARIATIONS IN ELECTRIC
AND THERMAL RESISTIVITY

A. E. Kennelly

Vol. xxix-1910, pp. 465-481

Theoretical and mathematical investigation of the losses in furnace electrodes, taking into account variations in the physical constants with temperature. The treatment includes full development of formulas and illustrates their application by numerical examples.

Discussion, pp. 482-484, by Messrs. Carl Hering, and L. B. Stillwell. General remarks on laws for the proportioning of electrodes.

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