INDEX.

Nitrates, formation of, by bacteria, 53. from nitrogen of air, 222.

Nitric acid, action of, on silver and cop-
per, 51.

Nodot, interference fringes, 57.
Norton, W. A., set of bars of wood, iron
and steel after a transverse stress, 284.
contact resistance, 442.

OBITUARY

0

Bartling, F. G., 326.
Boreau, Alexander, 326.
Brongniart, Adolphe, 326.
Gray, J. E., 326.
Grenier, J. C. M., 326.
Hanbury, Daniel, 326.
Hohenhacher, R. F., 326.
Jacobi, 326.
Kopp, Emile, 80.
Lapham, I. A., 326, 333.
Logan, Sir William, 81.
Marvine, Archibald R., 424.
Nolte, E. F.. 326.

Scrope, George Poulett, 248.
Thuret, Gustave, 326.
Wheatstone, Charles, 80.
Wing, Augustus, 334.

Observatory, Harvard, engravings, 159.
in the Pyrenees, 76.

U. S. Naval, Observations 159.
Ocean, see Pacific and Sea.

Oceanic circulation, wind theory of, 58.
Odontornithes, new forms of, 509.
Olefines and alcohol, 486.

Ostwald, effect of mass on chemical ac-
tion of water, 143.

Owen, R., reptiles with features of Triassic mammals, 330.

on the Dinocerata, 401. Ozone and carbon monoxide, 136.

P

Pacific, depth of North, 161, 506.
Packard, outlet of Great Salt Lake, 149.
Life Histories, noticed, 326.
Parish, R., specific gravity balance, 246.
Paroxybenzoic acid and salicylic, 488.
Peabody Acad., Memoirs, noticed, 243.
Peale, A. C., Geol. Rep., noticed, 496.
Peat, compressed, 332.

Perrey, A., on earthquakes and age of
moon, noticed, 233.

Peters, C. H. F., new planet, 317.
Petrefaction, 150.

Phloroglucin and nitrates, 487.
Phonometer, Mayer, 324.

Phosphoric acid, effect of silicic acid on
estimation of, Jenkins, 204.
Phosphorus oxychloride, Remsen, 365.
Photometer, nebula, Pickering, 482.
Pickering, E. C., physical abstracts, 55,
144, 219, 320, 403, 488.

517

Pickering, E. C., nebula-photometer, 482.
Pictet, thermal properties of liquids, 321.
Pierre, crystallized hydrate of hydro-
chloric acid, 318.

Pinner, new hydrocarbon, 54.

Pirrier, E., on starfishes. noticed, 416.
Pisa, Tuscan Society of Science, 79.
Planet, new, 159; Peters, 317.
Plants, recently discovered, 75, 501.
Platinum, decomposition of water by,318.
Platinum, density of, 142.

stills, corrosion, 216.

palladium, etc., in silver coins, 486. Potassium and ethyl succinate, 129. Prime, F., Jr., Geol. Rep., noticed, 62. Proctor, R. A., Our Place among Infinities, 242.

Pteranodonts, a new order of Pterosauria, 507.

Pyrheliometer, new, 220.

Radiometer, Crooke's, 404.

Rammelsberg, Mineral-Chemie, 413.
Rath, v., seebachite is phacolite, 152.
Raymond, R. W., Report on Mines, 504.
Refraction, temperature and index of,406.
Remsen, I., action of potassium on ethyl
succinate, 129.

ozone on carbon monoxide, 136. phosphorus oxychloride, 365. Renault, B., on Botryopteris, 238. Rogers, W. B., gravel deposits, 60. Rosolic acid, 217.

Roux, G., carpels of Erodium, 158. Rowland, H. A., magnetic distribution, 17, 103.

Rue, de la, spark with large batteries, 322.

S

Sadtler, S. P., tartronic acid, etc., 114.
Salts, constitution of acids and, 218.
Sands, B. F., Observations, noticed, 331.
Sars, G. O., on Brisinga, and Cumacea,
328, 329.

Saturn, observations on, Trouvelot, 447.
Scheurer-Kestner, corrosion of platinum
by sulphuric acid, 216.

Scudder, S. H., fossil butterflies, 74.

fossil insects and myriapods, 494.
Schunk and Romer, new acid isomeric
with alizarin. 218.
Sea-bottom, Thompson, 78.

Secchi, proper motion of stars, 490.
Schmankewitsch, on Artemia, 330.
Set of bars of wood, iron and steel after
a transverse stress, Norton, 284.
Shepard. C. U., hermannolite, 140.
meteorite of Waconda, 473.