11] 
CHEMISTRY— 
Spectrum given by nickel-carbonyl, 
Liveing and Dewar, vi, 393. 
Stannic sulphide, Schmidt, ix, 149. 
Strontium, separation from calcium, 
Browning, ili, 50, 886; iv, 462. 
Sulphide solutions, physical consti- 
tutions, Picton, iii, 382. 
Sulphur, new modifications, Engel, 
ii, 509. 
Sulphuryl peroxide, Traube, ii, 340. 
Tartar emetic, standard solutions, 
Gruener, vi, 206. 
Tartaric acid, sensitive reaction for, 
Mohler, ii, 425. 
Telluric acid, iodometric method for 
the estimation, Gooch and How- 
land, viii, 379. 
Tellurium, double halides of, with 
potassium, rubidium and cesium, 
Wheeler, v, 267. 
Tetrazotic acid and derivatives, 
Lossen, ii, 68. 
Tin tetrachloride and tetrabromide, 
‘Lorenz, 1, 500. 
Titanic acid in soils, Dunnington, 
ii, 491. 
Tunestous oxides, Headden, v, 280. 
Urea from albumin, Drechsel, i, 154. 
Vapor-densities, at low tempera- 
tures, Krause and Meyer, i, 323 ; 
determinations, Lunge and Neu- 
berg, i, 426. 
Vapor-pressures, determination, 
Charpy, i, 828; of solutions of, 
sulphur and phosphorus, Gugliel- 
mo, Vii, 282. 
Water, composition of, by volume, 
Scott, vii, 8316 ; mass-composition, 
Dittmar and Henderson, vi, 473. 
Zine, action on dilute sulphuric 
acid, Prellinger, i, 68. 
Chemist, American Association of, i, 
307. 
Choffat, P., geol. survey of Portugal, 
vii, 320. 
Chrono-photography, Marey, vi, 72, 
396. 
Clark, W. B., geology and _ physical 
features of Maryland, vii, 320. 
Clarke, F. W., constitution of certain 
micas, vermiculites and chlorites, 
ii, 242; Tschermak’s theory of the 
chlorite group, iii, 190 ; constitution 
of certain micas and chlorites, iii, 
378; constitution of ptilolite and 
mordenite, iv, 101; anorthite and 
epidote, viii, 429 ; zeolites, viii, 187; 
jade-like garnet from California, |, 
76. 
Clarke, J. M., Clymenia of western 
New York, iii, 57 ; genus Acidaspis, 
VOLUMES XLI-L. 
525 
iii, 158; list of species of the Oris- 
kany fauna N. Y., iv, 411; study 
of the brachiopoda, viii, 71. 
Claypole, Paleaspis of, iv, 428. 
ri age H. H., weather periods, vii, 
Clemons, C. F., determination of 
selenious acid by potassium per- 
manganate, 1, 51. 
Clinton iron ore, Smyth, iii, 487. 
Cloudland, Ley, ix, 168. 
Cloudy condensation, colors of, Barus, 
vi, 80. 
Coast Survey, U. §., base apparatus 
of, Woodward, v, 33. 
Cobalt-solutions, color, Etard, iii, 481. 
Cohen, E., Meteoritenkunde, ix, 324. 
Coleman, A. P., antholite, Elzivir, 
Ontario, viii, 281. 
Colles, G. W., Jr., distance of the 
stars by Doppler’s principle, v, 259. 
Collin, Governmental maps, vii, 484. 
Colloid solutions, Linebarger, iii, 218. 
Color, intensities of lights of different, 
Mayer, vi, 1. 
of compounds and their chemical 
constitution, Schiitze, iv, 252. 
of hydrogen peroxide, ozone, 
Spring, 1, 543. 
photography, Lippmann, iv, 75, 
499, v, 68; Newhaus, ix, 469 ; Vogel, 
iv, 423; Wiener, 1, 417. 
relations of atoms, ions and mole- 
cules, Lea, ix, 357. 
of solutions of salts as affected by 
the concentration of the ions, Line- 
barger, iv, 416. 
system, Rood, iv, 263. 
Colorado Scientific Society, Proceed- 
ings, iii, 541. 
Colors of cloudy condensation, Barus, 
v, 150, 528. 
Comets, capture of, by planets, New- 
ton, ii, 183, 482. 
Compressibility and dilatation of 
gases, Amagat, i, 155; hydrogen, 
etc., 1, 512. 
Comstock, C. B., value of the meter 
in inches, vi, 74. 
Comstock, G. C., secular variation of 
latitudes, ii, 470. 
Concave gratings, asymmetry in, Ryd- 
berg, v, 390. 
Conductivity of rocks for heat, Kelvin 
and Murray, 1, 419; Peirce and 
Willson, 1, 4385. See under Elec- 
tric. 
Connecticut, wooded area, map, ], 
431. 
Conrad’s works, republication, v, 335. 
Constant of aberration, Preston, vii, 
242. 
