Corrosion of steam Generators, On a little known Cause of

.........cxxiii, 77

underground Pipes by Leakage of the Return-current from
electric Railways
.........cxxxvii, 400; cxxxviii, 78

Corrosive Sublimate, Hydrocyanide of Mercury in place of.................cxxvii, 235
Cosmical Electricity, Thoughts on Elihu Thomson....

Cost of Power at Niagara...

Cotton Fiber, The. Thomas Pray, Jr...........

-seed Oil, Industrial Uses of. Robt. Grimshaw.. Coupling, Shaft-, A simple and effective. J. H. Cooper Court of Patent Appeals...

................

.....cxxviii, 241 ....cxxvii, 80, 191

.........cxl, 392

cxxix, 343

Cowles' Electric Furnace, Composition of certain Products from. C. F.
Mabery.

Cows' Milk, Citric Acid in..

.....cxxii, 271 ..........cxxvii, 138 Crane, traveling, The modern, A. E. Outerbridge, Jr. ....................CXXXV, 247 Crematory for incinerating the Bodies of the Dead. M. L. Davis........cxxix, 432 Cresson (Elliott) Medal, Resolution of the Institute prescribing the manner

..cxxxvi, 320

Fund, Report on the Condition of. Frederick

of awarding....

Fraley..

Election of Geo. V. Cresson as Trustee,

....cxxvii, 408

Cross-cuts and Tunnels, Importance of in anthracite Mining. Henry A.
Wasmuth.

Crucibles of Blast-furnaces. John M. Hartman..
Cryolite, fused, Specific Gravity of. J. W. Richards.......................cxxxviii, 51
Crystals, Formation of by Diffusion...

Cudbear, Detection and Estimation of Magenta in..........
Cupolas for melting Pig-iron. Gouvy-Durfee......
Cupric Sulphide, Colloidal

CXxxviii, 79 .....cxxvii, 73

..cxxvi, 425; cxxvii, 1

Curiosities in early Electro-therapeutics. E. J. Houston.......

Current, Currents. See Electric Currents, Electricity.
Meter, Electrical. George Forbes...
-meter Observations, Report on.

G. L. Martin...

Cusps of the gear-tooth Curve. Geo. B. Grant...
Cutting glass Tubes, Sure Method of.........
Cutch and Gambier. Henry Trimble.
Cyanide Poisoning, Antidote for.......
Cyclostyle and duplicating Apparatus. Report on...........
Cylinder Condensation in Steam Engines, The Law of. L.
Cylinders for successive expansion Engines, Sizes of...........

D

.....cxxiii, 66 ......cxxiii, 416

.......cxxxi, 304

Daguerre, Portrait of, presented by Mrs. O. H. Willard.....
Dahlia, yellow and red, Coloring Matter of.......
Dambose, Identity of Inosite and......
Dangers in electric Lighting, Note on some.
D'Arsonval Galvanometers, Recent Improvements in. N. H. Genung,

Wm. McDevitt

CXXXV, 63 ........................Cxxix, 432 .........cxxviii, 362

Davis' Method of incinerating the Bodies of the Dead..
Dead, Sanitary Disposition of the. C. A. Harvey
Death by Electricity, Muscular Contractions following. E. J. Houston,

Decomposition of halogen Hydrides of Oxygen in Sunlight.....

petroleum Naphtha by heating.........

Delany's System of fast Telegraphy..

........cxl, 472

synchronous-multiplex Telegraphy. Report on......cxxi, 312 Report on Paul La Cour's Protest against Award to,

cxxiv, 81

Delaware and Raritan Rivers, Ship-canal connecting (Philadelphia-New
York Canal). L. M. Haupt...........
River, Channel of at Philadelphia. E. F. Moody. ..................................................cxxi, 78

Removal of Islands in.......

cxxvi, 339

Depth of Focus in photographic Lenses. W. A. Cheyney...............cxxix, 470
Depretz's electric Furnace...

Developer, Hydroquinone as a, in Photography..
Developers, photographic, new.

De Voe's underground electric Conduit...

Derivatives obtained from Monochlordinitrophenol and the Bases of the

..............

CXXV, 127 ....CXXV, 338 ....cxxviii, 492, 493, 494

....cxxxvii, 160

Diacetyl and some of its Derivatives. Harry F. Keller. "Diagraph," An improved duplicating Machine..... Diamide or Hydrazine...

..cxxiii, 499

....cxxvii, 302

Diamond-drill, Use of by the ancient Egyptians. W. F. Durfee..........cxxx, 318

.....cxxiv, 240

.......cxxi, 222

......cxxxi, 484

Didymium, Decomposition of

Diazotype Process of photographic dyeing and printing. John Carbutt...

......cxxvii, 445

Diffraction of Sound. W. Le Conte Stevens....
Dikes, Compound, The most economical Cross-section of. L. D'Auria...cxxv, 482
Dilatation and Compressibility of Water or the Displacement of its maxi-
mum Density by Tressure. E. H. Amagat......
Disconnecting Device, safety, for trolley Lines. Johnston's............ cxxxvi, 319
Discovery of America, Fourth Centennial of................................
Disinfectant, Oxynaphtoic Acid.....

Distillation, fractional, New Apparatus for...
Division of a Set of Weights. Most rational..
Double Stars, New......

.....cxxviii, 477

.cxxxiii, 69

.cxxv, 356

Dougherty Railroad-signal. Report on...............
Dougherty's type-writing Machine.....
Downward-draught Furnaces. C. A. Lozano and H. F. T. Erben..cxxiv, 375, 423

Drawing Process, The Flow of Metals in the. Oberlin Smith..
Technical Training, etc., Value of in the Public Schools. Edward
Combes
....cxxviii, 209
Driving-wheels, locomotive Hammer-blow of. W. E. Lockwood......cxxxiv, 494
Drinking Water, The use of galvanised Iron for conveying, etc.
Haines....

Reuben

Druidical Remains in Peru..

Drown's Method for Phosphorus in Iron and Steel. Modification of. G. L.
Norris

Dry-cell, A new portable. E. F. Northrup..
Duplicating Apparatus, The Cyclostyle. Report on .............

Machine, Krumbhaar's improved....

System. Edison's Mimeograph, Report on........

Durfee's hydraulic vacuum Pump and Blow-pipe...
Durham house-drainage System. Exhibition of...

....CXXXV, 223, 318

..........cxxxviii, 480 ...cxxvii, 381 ...cxl, 311 ...cxxviii, 320

Duty-trials of a Pumping-engine built by The Geo. F. Blake Mfg. Co. for

the City of Newton, Mass. Peabody & Dean...

Dye and tanning Material from Catechu....

Colors, artificial, Analytical Tables for the qualitative
of. Weingartner-Zetter...

Dyeing, A Revolution in. R. L. Chase..

with Chlorophyll....

Dyestuff, Yellow, from gallic Acid...

Dyewoods, A new Method and Apparatus for extracting.

Dyes and coloring Materials from La Plata.......

.....cxxiii, 179

Dyke at the Head of Pea Patch Island, Delaware River. L. D'Auria,

cxxxiii, 328

Dynamic Electricity, Development of. Wm. Dennis Marks.................cxxi, 175
Dynamics, graphical, The Subnormal in. I. P. Church.....................cxxxiii, 23
Dynamite Gun, Pneumatic. E. L. Zalinski
.....cxxvii, 328, 408

Dynamo-electric Machine, Dynamo and motor Calculations. C. H. Bedell,

cxxxiii, 497

Design of. G. S. Dunn,

cxxxvii, 140, 209

Largest Brush. R. H. Thurston... .......cxxii, 263 Machinery, Law of the Variation of the E. M. F. of a Westinghouse Dynamo. Searing and Hoffmann...cxxviii, 93 Machines, Franklin Institute Tests of. Carl Hering...cxxii, 448

Dynamometer for small Motors. John Hoskin..

Tatham's.........

E

Early Conception of the magnetic Field.

E. J. Houston..

.................cxxxiii, 208

Electro-therapeutics, Some Curiosities in. E. J. Houston........cxxxiv, 402

Earth, How it is Measured. J. H. Gore..

....cxxxiv, 358, 415

-pressure, A Theory of the actual, etc. P. Vedel..........cxxxviii, 128, 189

Earthquake, Disturbance of astronomical Levels by....

Earthy Matter in Plants, Distribution of.....
Economics of automatic Engines. R. H. Thurston......

Edison's Mimeograph and duplicating System, Report on..................cxxvii, 381
Editorial Comment...

.....

Edson's pressure-recording Gauge, Report on...
Education and the State University. Wm. S. Aldrich...
Efficiency of Steam-jacket, Maximum. R. H. Thurston.....
"Eggio," a Preparation of the Yolks of Eggs, Analysis of.

Eggs, Salicylic Acid for preserving

Egyptian Civilization, Dawn of. Geo. Sélikovitch..
Egyptians, ancient, Use of Diamond-drill by. W. F. Durfee
Eikonogen, A new Developer in Photography.......
Electric Arts, Progress in 1888. Secretary's Report...

Brevities....

.......cxl, 262 ..........................cxxxi, 276 C. S. Boyer,

cxxxiii, 205

..........cxxiii, 341 ..............Cxxx, 318 ..........Cxxviii, 492

......cxxiii, 67

Circuits, divided, Graphic Construction for determining the Re-
sistance of....

Clocks, Contact-maker for. Louis H. Spellier....
Conductivity of Gases and Vapors.

Conduit, Underground, De Voe's.........................................cxxxvii, 160
Chenoweth's, Report on.......................

Crucible, Siemens'.....

..........cxxviii, 230 .CXXV, 475

Current, Oxidation of metallic Arsenides by. Lee K. Frankel,

cxxxii, 451 Sulphides by. Edgar F. Smith............exxx, 145 Currents, continuous. Use of the constant-shunt Method for the Measurement of. C. W. Pike.. .......cxxxiii, 476 Currents, high-voltage, Oil as an Insulator for. David Brooks. cxxxi, 491 Induction Coils and Induction of. Elihu Thomson,

cxxxii, 81, 240

Physiological Effects of Currents of high frequency.
E. J. Houston..
Polyphased. Paul A. Winand.
Discharges, Action of. on pure Nitrogen....
Forge, Using a saline Solution as Resistance.

Electric forging, rolling and shaping Metals. Geo. D. Burton............cxxxi, 400 Furnace, Calcium carbide, A new Product of the,

cxxxix, 72, 139, 232, 321

Cowles', Composition of certain Products from. C. F.

Mabery

Cowles, Report on...
Depretz's.

......cxxii, 271 .....cxxii, 51 ................................CXXV, 127

Lontin's..................................................................cxxv, 130
Napier's ....................................................................................................CXXV, 376
Pepys'...

Production of aluminum Alloys in the..

............

and its Alloys in the.
A. Cowles.......

Furnaces, Some early Forms of. Edwin J. Houston,

Watt's...

CXXV, 22 .exxii, 51

Eugene

.........cxxi, 111

cxxv, 27, 127, 300, 376, 475; cxxvi, 64, 215

........cxxvi, 215

Werdermann's................... ...............................cxxvi, 64
Fuses, Telephonic Tests of............................ ........................ .....................................................................................
....cxxii, 301
Heaters, Prize for......

Igniters, Gas Engines with, at Paris Exposition.......
Induction and Transformers for electrical Distribution. Carl
Hering........

Light for laboratory Investigation.......

..cxxii, 134

New Lamp of the incandescent-arc Type. Geo. W. Walker,

Westinghouse incandescent Lamp............
Plants, Trials of Motors for.....

Some interesting Peculiarities of the alternating
Thos. Spencer...

Lighting, Central-station.

Some Dangers in. Wm. McDevitt......................................... .....cxxxi, 304 Machines, Use of Steel in. H. F. Parshall........

cxxxiv, 66

Measurement. Weston Instruments, Effect of external magnetic
Disturbances on. C. W. Pike
Measuring Instruments, recording. H. S. Hering...... ...........cxl, 463
Meters, Forbes'. Edwin J. Houston................................................................................
Motor. F. B. Crocker.......

Dynamo and, Design of. G. S. Dunn...

Single-phase synchronous, Action of. Bedell & Ryan, cxxxix, 197 Motors. Dynamo and motor Calculations. C. H. Bedell.....cxxxiii, 497 Rough-and-ready Dynamometer for small. John Hoskin,

Organs at Paris Exposition.......
Power Transmission.

E. Griffin........

...

cxxxi, 489 ......exxix, 461 ...cxxxiv, 169

Julien System. Pedro G. Salom.........cxxiii, 476
Lauffen-Frankfort, Tabulated Results of,

cxxxiv, 167
Schlesinger's System... ...........cxxii, 366, 394
Railway at Buda-Pesth. H. W. Bartol................................................................. cxxxiii, 125
Test of. H. S. Hering...

.....cxl, 462 A. L. Johnston............................................cxl, 135 ..cxxix, 265

Railways. E. Griffin......

Corrosion of Pipes by Leakage of return Current,

in the United States......

cxxxvii, 399, 400 ........cxl, 157

System of protecting Buildings from Water-overflows. Leopold
Weil....

tabulating System, The Hollerith, Report on.. .................................................................
....cxxix, 300
Telegraph, Future of the..
welding. Elihu Thomson...

... ........................... .........................................cxxiii, 357; cxxvi, 399

C. J. H. Woodbury...
at the Paris Exhibition. Carl Hering..
Thomson's System. Remarks on........
Report on.....

..........cxl, 472

......cxxvi, 471

......

wiring, System of the Interior Conduit and Insulating Co.

Johnson..........

..CXXX, 220

..... CXXX, 80 ......CXXX, 19 E. H. ......cxxxi, 169

H. S. Carhart....
C. J. Kintner.......

...cxxviii, 376 .......exxi, 377 cxxiv, 449

Electrical Action, Review of Theories of.
Art in the United States.
Current-meter. George Forbes....
Distribution by alternating Currents and Transformers. Rankin
Kennedy.

..........

.......cxxiv, 234

of Time. Allan D. Brown..............cxxv, 462; cxxvi, 14

elementary Particles, Quantity of...
Exhibition and pure Research, The. M. B. Snyder
Insulation....

Journals, a List of. Carl Hering...

.......cxxi, 424 .....cxxii, 401

Measurements, especially as applied to commercial Work. Wni.
A. Anthony

Range-finder, Fiske's. Report on............

Resistance of divided Circuits, Determining. the, by graphical
Construction...

ELECTRICAL SECTION. See Franklin Institute.
Electrically-lighted Buoys in New York Harbor......
Electricity, Application of to weaving......

Michaelis........

.......

....CXxviii, 157

...........

..........cxl, 313 ....exxiii, 72

cxxii, 17, 81

the Development of Marksmanship. O. E.

applied to the bleaching of textile Fabrics. Louis J. Matos."

in the modern City. T. C. Martin.........
in Warfare. B. A. Fiske

Is it Force or Matter? Carl Hering..

Currents.

.....cxxxi, 391

cxxii, 96

....................................................Cxxxviii, 198, 258 .cxxi, 61, 81; cxxx, 183 ......cxxiii, 488

.......CXXX, 87

its past, present and future. Ralph W. Pope...............cxxxi, 21, 88
Modern Conceptions of. Louis Duncan
Muscular Contractions following Death by. E. J. Houston.cxxix, 421
New Form of standard Cell. Carl Hering..
Recent Developments of, abroad. Carl Hering. .................. ......................... CXXxvi, 447
Retribution by.......
..................Cxxii, 65
.....cxl, 158

Transmission of Power by. Frank J. Sprague.........cxxvii, 161, 254 Electrified Bubbles.

Electro-chemical Actinometer..

-chemistry, Recent Advances in. Jos. W. Richards..

.....cxxvi, 416 ....cxxxix, 351

-deposition, Elmore's Process for making copper Tubes by......... CXXV, 340 of Platinum. Wm. H. Wahl.....

Is Actinism a Species of? E. J. Houston.......
Manufacture of Chlorates by

of Hydrogen-fluoride and the Properties of Fluorine. H.
Moissan........

.........cxl, 153

..cxxxii, 471 ...cxxix, 256

metallic Sulpho-cyanides. Lee K. Frankel..
Separating Copper from Mercury by. Smith and Frankel,