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Organic Acids, Synthesis by the Electrolysis of ...
Oxygen, Brin Process for ......

469
154

Paris, Telegraphy in .........

471
Pendulums, Influence of Varying Pressure upon......

311
Perkins Machinery of the Steam Yacht "Anthracite,” On the Last
Experiment with. By Chief Engineer Isherwood....

260
Phipson, Dr. T. L. On the New Metal Actinium.....

464
Phosphor-Tin....

154
Phosphorescent Alumina........

387
Photographic Images, Reversion of, etc..

72
Photometer, Athermanous....

466
Physical Phenomenon, Curious ......

237
Polarization, Rotation of the Plane of.....

471
Protoplasm, Living and Dead.

471

Radiant Absorption of Carbonic Acid

388
Matter ....

387
Radio-dynamic Facts. By Pliny Earle Chase, LL.D..

274
Radio-dynamics. By Pliny Earle Chase, LL.D...

....57, 123
Another Verification of Prediction. By Pliny Earle
Chase, LL.D.....

386
Radiophony

278
by Lamp Black........

467
Rail Steel, Chemical Methods for Analyzing. By Magnus Troilius.325, 415
Ramie.........

467
Rapid Phenomena, Application of Electricity to the Study of........ 468
Reese, Jacob. Burnishing and Ductilizing Steel......

206
Reynier's Constant Battery.......

72
Rock Drills, Percussion. By Robert Grimshaw.

50
Rocks, Destruction of under Water.......

171
Roelker, C. R. Experiments on the Strength of Wrought Iron and
Steel at High Temperatures......

241
Roscoe, H. E. Indigo and its Artificial Production ....

295
Rubmkorff Coil, Modification of..............

235

.36, 49

Sand Filtration at Berlin. By Prof. Wm. Ripley Nichols.................. 436
Scientific Principles of Electric Lighting.....

.279, 364, 445
Screw Propellers, Account of Experiments with. By Chief Engineer

Isherwood, U.S.N..............
Selenium, New Electric Property of ...........

237
Sodium Lines, Relations of Intensity in .....

154
Solar Protuberance, Remarkable.......

74
Spectroscopic Grouping

469
Spectrum, Comet.......

468
St. Gothard Tunnel.......

461
Steel, Burnishing and Ductilizing. By Jacob Reese....

206
Temperature of Least Resistance in ........

74

Steel Rails, Discussion of the Papers of Sandberg, Dudley and Holley

18, 93, 183
Stored-up Electricity: Faure's Secondary Battery

68
Sulphur Springs, Fluctuations of...........

235
Sulphuric Acid, Volatility of.............

49
Sun Spots upon Temperature, Influence of..

315
* Weighing the, by a Soap Bubble. By Pliny Earle Chase, LL.D... 462
Synthesis by the Electrolysis of Organic Acids.

469

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Tatham, William P. An Improved Dynamometer.

321
Telegraph Wires, Effects of Lightning upon Trees near..

470
Telegraphing, New Method of .........

469
Telegraphy in Paris....

471
Telephonic Transmission, Disturbances of...

314
Temperature, Influence of Sun Spots upon....

315
of Least Resistance in Steel.....

74
Thermo-dynamics of Liquid Surfaces..........

73
Thomson, Elihu. Notes on the Properties of Dynamo-Electric Ma-
chines.....

427
Sir William. On the Sources of Energy in Nature Availa-
ble for Mechanical Effect....

376
Thurston, Prof. R. H. Note Relating to the Proper Method of Expan-

sion of Steam and Regulation of the Engine. 255
On the effect of Prolonged Stress upon the

Strength and Elasticity of Timber............... 161
Timber, On the Effect of Prolonged Stress upon the Strength and Elas-
ticity of. By Prof. R. H. Thurston....

161
Trees near Telegraph Wires, Effects of Lightning upon ......

470
Troilius, Magnus. Chemical Methods for Analyzing Rail-Steel......325, 415
Tunnel, St. Gothard.....

461

(6

Underground Life in England ......

472

Velocity of Light in Quartz.......

156
Ventilation and Heating, Properties of Air Relating to. By Robert
Briggs, C.E..........

132
Vessels, New Model for.........

354
Volatility of Sulphuric Acid

49

Weighing the Sun by a Soap Bubble.....

462
Wheatstones's Microphone, Modification of, etc. By Alexander Gra-
ham Bell......

66
Wine, Algerian

314

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Volatility of Sulphuric Acid, 49. Reynier's Constant Battery, 72. Reversion of Photographic Images

by Prolonged Illumination, 72. Thermo-Dynamics of Liquid Surfaces, 73. Intermittent Lumin-
ous Signals. 73. Remarkable Solar Protuberance, 74. Temperature of Least Resistance in Steel,
74. Behavior of Gas Under High Pressures.

74

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Authors of “The American Patent System," "Our Country's Debt to Patents," "Answers to Questions of the State Department Relating to Patonts.” Also,

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