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JOURNAL OF THE FRANKLIN INSTITUTE. .

Vol. CXII.

INDEX.

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

464
Action at a Distance.....

470
Adams, Prof. W. Grylls. Scientific Principle involved in Electric
Lighting ....

.......... 279, 364, 445
Air, Properties of, relating to Ventilation and Heating. By Robert
Briggs, C. E..

132
Alumina, Phosphorescent....

387
Armatures, Magnetic, Various Effects of.......

444
Athermanous Photometer.....

466
Atmosphere, Height of.....

470
Auchincloss' Averaging Machine............

121
Averaging Machine, Auchincloss'.

121

Battery, Reynier's Constant

72
Bell, Alexander Graham. Modification of Wheatstone's Micro-
phone, etc.......

66
Birkinbine, John. Blast-furnace Hearths and Linings........

429
Blast-furnace Hearths and Linings. By John Birkinbine....... 429
Boiler Explosion, etc. By W. Barnet Le Van.............

119
Book Notices :

Civil Engineer's Pocket Book. By John C. Trautwine....... 238
Elementary Projection Drawing, etc. By S. Edward Warren.... 392
Elements of Plane Analytic Geometry, etc. By George R. Briggs.. 476

Figure of the Earth, An Introduction to Geodesy. By Prof.
Mansfield Merriman..

393
Modern Milling, etc. By Robert Grimshaw.......

473
Preparation and Use of Cements and Glue. By John Phin ........ 475
Progressive Agriculture. By C. L. Ingersoll...........

474
The Relation of Science to Agriculture. By Harvey W. Wiley.. 474
Study of the Various Sources of Sugar, etc. By Lewis S. Ware.. 472
Wood-working Tools; How to Use them.........

240
Working Drawings, etc. By Prof. L. M. Haupt..

.156, 389
Briggs, Robert. Properties of Air relating to Ventilation and Heat-
ing.......

132
Brin Process for Oxygen.

154
Bronzing Copper .........

155
Bubbles, Explosion of......

468

66

Carbonic Acid, Radiant Absorption of ...........

388
Cartwright, Henry, Memoir of. By Washington Jones....

399
Chase, Prof. Pliny Earle. Radio-Dynamics..........

........57, 123
Another Verification of
Prediction ..........

386
Radio-Dynamic Facts

274
Universal Energy of Light..........

312
Weighing the Sun by a Soap Bubble......... 462
Chemical Methods for Analyzing Rail Steel. By Magnus Troilius..325, 415
Chinese Acoustics.........

155
Clark, John S. Industrial Education from a Business Stand-point..... 218
Comet Spectrum.......

468
Cometary Light and Heat, Origin of......

468
Spectra ......

375
Comets, Constitution of .........

388
of 1811 and 1881.
Compassess, Improvement in

315
Copper, Bronzing....

155
Corliss Condensing and Corliss Non-condensing Engine, Experimen-

tal Inquiry into the Relative Economic Efficiencies of. By Chief
Engineer Isherwood, U.S.N.......

170
Cotton in Italy .......

235
Currents, Absolute Measure of by Electrolysis......

315
l'pper Atmospheric.......

316
Cutting Glass and Porcelain......

469

467

158

Drawing School, Franklin Institute......
Du Puy, Charles M. Direct Manufacture of Iron from Ore, etc...........
Dynamite, Felling Trees with .........
Dynamo-Electric Machines, Notes on the Properties of. By Elihu

1
315

Thomson ........
Dynamometer, Improved. By William P. Tatham.

427
321

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46

Electric and Magnetic Actions, Mechanieal Imitation of......... 294
"
Light in French Lighthouses.....

217
Lighting. Report of the Committee on the Precautions to be

taken to Obviate the Dangers that may arise
from systems of ............

401
Scientific Principles involved in. By Prof. W.
Grylls Adams, F.R.S

......... 279, 364, 445
Lights..........

435
Motor and Battery, Griscom's. Report of the Committee on
Science and the Arts on.........

440
Property of Selenium, New.........

237
Electrical Congress, Conclusions of the.....

472
Electricity, Applications of .... ......

153
to the Study of Rapid Phenomena.. 468
Conservation of...........

155
of Mechanical Vibrations.....

236
Electrolysis, Absolute Measure of Currents by

315
Electro-motive Force, Inverse....

155
Electromotor, Griscom's..........

463
Energy, On the Sources of, in Nature, available for Mechanical Effect.
By Sir William Thomson ........

376
England, Underground Life in...........

472
Expansion of Steam and Regulation of the Engine, Note relating to.
By Prof. R. H. Thurston......

255
Explosion of Bubbles .....

468

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Faure's Secondary Battery, etc............

68
Filtration by Sand at Berlin. By Prof. Wm. Ripley Nichols ........... 436
Fire Escapes and Elevators. Report of the Committee of the Frank-
lin Institute on.....

408
Foreign Languages, Pronunciation of.....

118
Franklin Institute. Award of the Elliot-Cresson Gold Medal to Wil-
liam W. Griscom..

477
Donations to the Library.

..75, 317
Drawing School......

158
Election of W. H. Thorne to Board of Managers.. 394
Proceedings of........

......... 75, 316, 394, 476
Resolutions of the Board of Managers............ 477
Resolutions of the Institute .................317, 398, 400, 478

Report of the Committee on Science and the Arts
on Griscom's Electric Motor and Battery......

440

Gas, Behavior of, under High Pressure.........

74
Geodetic Triangles, Compensation of...

314
Glass and Porcelain Cutting......

469
Grimshaw, Robert. Percussion Rock Drills........

50
Griscom's Electric Motor and Battery. Report of the Committee on
Science and the Arts on.

410
Electromotor .......

463

Harmonic Vibration, New Experiments in ...............
Heating Apparatus, New .........
Holtz Machine, Illumination of Tubes by.
Hydrogen Lines, Variations of...........

386
316
388
234

Iron and Steel, Experiments on the Strength of, at High Tempera-
tures. By C. R. Roelker..........

241
The Direct Manufacture of, from Ore, etc. By Charles M. Du Puy,
C. E............

1
“ Magnetic Intensity of...

156
Malleable ...........

385
Illumination of Tubes by the Holtz Machine.

388
Indigo and its Artificial Production. By H. E. Roscoe, LL.D., F.R. S. 295
Industrial Education from a Business Stand-point. By John S. Clark.. 218
Isherwood, Chief Engineer. Account of Experiments with Screw

Propellers, etc........
Experimental Inquiry into the Relative
Economic Efficiencies of a Corliss Con-
densing and a Corliss Non-condensing
Engine, etc.........

170
On the Last Experiment with the Per-
kins Machinery of the Steam Yacht
“ Anthracite"

260

.36, 49

Lamp Black, Radiophony by .......
LeVan, W. Barnet. Boiler Explosion, etc.........
Light and Electricity, Velocity of.....

Connection between Refraction and Absorption of.......
Universal Energy of. By Pliny Earle Chase, LL.D.

Velocity of, in Quart?.......
Lightning, Effects of, upon Trees near Telegraph Wires.....
Liquid Surfaces, Thermo-dynamics of....
Locomotive Sparks, Prevention of....
Luminous Signals, Intermittent....
Lunar Observations in Algiers

467
119
205
388
312
156
470

73
237

73
236

Magnetic Armatures, Various Effects of..........
Intensity of Iron .........

156
Magnetism to Atomic Weight, Relation of.

236
Malleable Iron.......

385
Marks, Prof. Wm. D. Necessity of Clear Mechanical Conceptions...... 355
Marine Cables, Registering Apparatus for.........

273
Mechanical Conceptions, Necessity of. By Prof. Wm. D. Marks......... 355
Imitation of Electric and Magnetic Actions...

294
Vibrations, Electricity of .....

236

66

New Metal Actinium, On the.........
Nichols, Prof. Wm. Ripley. Sand Filtration at Berlin
Nitrates, Decomposition of, etc.....

464
436
153

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