Centipedes, 336.

Clouds and winds observed from balloons,

112.

Clusters and nebulæ, 15.
Coagulation of fluids, 285.
Coal, boring for, 225.

gases inclosed in, 209.
in Dakota group, 248.
sections of, 226.

Coal-fields, extensive, 258.
-fields of Spain, 226.
-gas, hydrocarbons of, 214.
sulphur in, 418.

mals, 278.

Cephalosiphon, 345.

Cerium, atomic weight of, 201.
metals, the, 201.

salts for dyeing black, 491.

Chabas, 291.

Chain for towing boats, submerged, 446.
"Challenger," work accomplished by the,

40.

Chandon light, 415.

47.

Cobalt and nickel, magnetism of, 190.
Cobbold, Dr., 337.

Cochin China, capture of eels in, 403.
diarrhoea, 535.
Cockroach, a fossil, 330.

digestion in the, 328.
Cockroaches and earwigs, how they fold
their wings, 327.

Codfish, utilizing the offal of, 391.

146.

Chapelas, S9.

Chapman, Dr. A. W., 355.

Charpentier, 327.

Chekanoffsky, 541.

Chemical action of solar rays, 193.

balances, 135.

Chemistry and metallurgy, 193.
Chilognathes, 337.

China, peculiar disease among dogs in,

Coffee, detecting adulterations in, 206.
Coggia's comet, spectrum of, 37.
Cohausen, 485.

Cohn, 126.

Cold, mechanical production of, 147.
waves of air, origiu of, 104.
Colding, 101.

Collett, John, 300.

Coloring matter in the murex shell, 333.

of the eggs of birds, 304.

Colors of double stars, 17.

Combustion, influence of pressure on, 150.
Comet II., 1840, 36.

III., 1862, 35.

VII., 1873, and comet L., 1818, iden
tical, 57.

the periodic, of D'Arrest, 37.

Comets, calculation of the absolute per
turbations of, 36.

Chrysardhin, 526.

Ciaccio, G. V., 326.

Cicada, the seventeen-year, 326.

Cienkowsky, 250.

Cinchona plantations in British Sikhim,

529.

Compass, curious Japanese, 188.
deviation of the, 162.

in iron ships, deviation of the,

163.

observatory of Cronstadt, 160.

Composition, anti-fouling, 435.

of American wheat prod
ucts, 375.

of coral, 226.

Comstock lode, 263.

Conduction of heat in gases, 183.

Conflagrations, extinguishment of, 464,

465.

Connecticut agricultural station, 370.

Fish Commissioners' Report,

394.

River, salmon in, 409.

Conochilus volvox, 324.
Cooking meat by cold, 422.

of leguminous vegetables, 426.
Coombs, Dr. S. W., 398.
Cooper, Dr., 111.

Dr. J. G., 316.

Cope, Prof., 264, 276, 303, 304, 315, 316.
Copper-alloy adhering to glass, 512.
Coprinus radiatus, 362.

Copying apparatus, 487.

Copying-ink pencils, imitation of, 484.

preparation for, 455,

-paper, photographic, 482.

De Haldat, 160.

De la Blanchere, 405.

Delachanal & Mermet, 415.

De la Rive, Prof., 75.

ness of, 430.

Cracknell, 168.

Cramp & Sons, 468.

Cremation in France, 185.

Cresson, John C, 542.

Crocé-Spinelli and Sivel, 449, 450.

Crocker, Charles, 402.

Crookes, Prof., 520.

Crosby, 99.

Crossley's observatory, 18.

Crotch, Duppa, 299.

Cruickshank, 343.

Crustacea, metamorphosis of, 334.

Cryohydrates, 195.

Crystallization, instantaneous, 138.
Crystals, polarizing, 272.

Cuban fishes, Poey's catalogue of, 320.
Cuir-liège, a new fabric, 505.
Culley, 447.

Culture of plants among the aborigines,

370.

Döllen's determination of local time, 5.
Dolores River, 24S.

Domestic and household economy, 411.

Domesticating the prairie chicken, 310.
Domeyko, 220.

Donnadieu, A. L., 332.

Doppler's theory, 20.
D'Orbigny, Prof., 542.

Dorn, Dr., 120.

Double star 2 634, 18.

stars, catalogue of, 17.

colors of, 17.

Double-balance method in duplex teleg

raphy, 169.

Earth, interior structure of the, 121.
internal heat of the, 74.
interual temperature of the, 119.
rotation of the, influenced by the
tides, 130.

temperature at Königsberg, 120.
temperature of the, 98.

Earth's axis, changes in the, 78.

515.

Endemic pellagra and Indian corn, 535.
Endlich, F. M., 249.

Energy and gravitation, 135.
Engelmann, Dr. George, 350.
Engineering and mechanics, 431.
Engraving on wood, French method of,
483.

Entomological specimens, preservation
of, 275.

Eosin, a new fluorescent dye-stuff, 492.
Eozoon Canadense, 341.
Epiga, heteromorphism in, 351,
Equilibrium of forces, 2.
Erck, W., 18.
Ericsson, John, 40.
Ertel, 6.

Erva de Rato, 526.

Esbeth, Dr., 272.

Etching photographs, 479.

currents, 119.

of purified air, 143.

of rock-salt, 136.

ains, 261.
Euler, 3.

Euplectella, gathering of, 340.
Europe, barometric pressure in, 83.
frequency of thunder-storms in,

129.

mineral products of, 1874, 437.

European drought of 1875, 91.

fresh-water fishes, new work

on, 319.

Evaporation from the skins of frait,

369.

Evolution, Cope's theory of, 276.

of the horse, 281.

Experiments on steel, 202.

upon non-luminous flames,
149.

illumination of factories, 413.
light, curious, 167.

tween, 163.

made under the direction
of F.V. Hayden, 1876, 249.
of Lieut. George M. Wheeler,

262.

of the Rocky Mountain re-
gion by J.W. Powell, 255.
Explosions in flour-mills, 428.
Explosives for fog signaling, 462.

researches on, 459.

Extinction of the elephant, probable,

304.

Eye of flies, the, 326.

Falb, Dr., 95.

F.

Flood-marks and gravel banks, 230.
Floor oil-paint, 497.

Flora of Guadalupe Island, 360.

Farlow, Prof. W. G., 364.

Farini, 331.

Farwell, 401.

Fatio, 323.

196.

Faulquier,

Fauna of the deep seas, 240.
Fautrat, 77.

Faye, 86, 87, 89, 93.

Faye's theory of storms, 84, 86.
Fearn, Thomas, 542.

Feathers, cloth from, 422.

Feeding value of salt-marsh and bog hay,
377.

Feilner, Captain, 312.

Female clothing in the bronze period, 294.
Ferrel, Prof., 65, 98, 100, 106.

Fertilizers, German potash salts, wood-
ashes, etc., 372, 373.

Fertilizing material, new, 383.

Fichtner, 479.

Field mice, destruction of, 381.

Filter, new form of paper,

Filtration, metallic, 174.

rapidity of, 518.

519.

Fir and pine tree leaves, new products
from, 507.

Fire-engines, relief valve for, 438.
-hydrant and street-lamp, 414.
-places, improvement in, 420.
-proof paper and ink, 484.

Fischer, Prof., 295, 430.

Fish, the rainbow, 321.

Fish Commission of California, 401.

Commissioners of Arkansas, 401.
of Connecticut, Re-
port of, 394.

of Iowa, Report of,
399.

of Kentucky, 398.
of Maine, Report of,
392.

of Massachusetts, Re-
port of, 393.
of Minnesota, Report
of, 400.

of New Hampshire,
Report of, 393.

of New Jersey, Re-
port of, 397.

of New York, Report
of, 395.

of Wisconsin, Report
of, 400.

Fish-bones, utilization of, 372.
-culture, warmed waters in, 406.
Fisher, Osmond, 121.
Fisheries and pisciculture, 385.

of Canada, Report of, 391.

Fishes, curions habits of, 324.

of the Ohio, Rafinesque's, 318.
remarkable structure of young,
323.

some curious Australian, 319.
Flames, non-luminous, 149.
Flammarion, 24, 27.

Fleitmann, Dr., 518.
Fletcher, Prof., 338.

Fleurcote de Langle, Vice-Admiral, 112.

Flies, the eye of, 326.
Floating seeds, 353.

Flow of metals, 137.

France, cremation in, 185,

cultivation of bamboo in, 366.
hail-storms in, 125.

magnetic map of, 162.

maritime fisheries of, 1874, 385.

Frankland, Prof., 149, 359.
Franklin Institute, 432, 438.
Fraser, Prof., 410.

Frecher, Siemens, and Halske, 168.
Freden, Von, 387.

Freezing, effect of, on the color of fabrics,
488.

French investigation of hay-fever, 534.
Fresh-water fishes, new work on Euro-
pean, 319.
rhizopods, 345.

Fresnel, 151.

Gallatin, Hon. Albert, 262.

Galle, Prof., 51.

Gallium, 203, 204.

Galvanic currents, glow due to, 166.
resistance, new theory of, 165.

Gamond, Thome, 542.

Gannett, Henry, 246.

Gardner, James T., 233.

Garnierite and noumeite, new minerals,
221.

Gas for light-houses, 461.

from bones, 417.

from cork-waste, 417.

from night-soil and dead animals, 418.
from wood and petroleum, 417.

Gas-retort, carbon from, 195.
Gases, elasticity of, 143.

from the stomach, 205.
inclosed in coal, 209.

spectrum dispersion by, 153.
Gastropods, embryology of, 338.
Gaudoin, 515.
Gauss, 3.

Gauss' theory of capillarity, 142.
Gautier, 217.

Gay safety mattress, 412.

poisonous properties of, 537.

Glycerine-gelatin, 427.
Gobba, Prof., 356.
Godeffroy, 416.

Goessmann, Prof., 372, 373, 374.
Goette, 296.

Gold, a new test for, 205.
varnish for metals, 496.
Golden-olive on cloth, 490.
Gonuch, 179.

Goodale, Hon. S. L., 390.
Gooseberries, American, 355.
Goppelsröder, 488.
Gorrie, Dr., 147.

Grad and Hagenmüller, 69.
Gramme light in railroad depots, 190.
machine, 164, 165.

Grandjean, Henry, 42.

Grant, George B., 43.

Grass, an intoxicating, 352.

Geisler, Dr., 287.

Gems, artificial, 514.

General physics, 135.

Genow, Dr., 367.

Genth, Dr. F. A., 222.

American mammals, 302.

Grassi, Dr. G., SS, 231.

Grate-fires, reflecting-plate for, 419.

Grattoni, Severino, 542.

George, Staff Commander, 108.

Georgine, a new yellow dye, 493.
Gerard, 498.

Gerbe, 409.

Gernez, 502.

Growth in certain fishes, rapidity of, 405.