INDE X. 
Scheerer (Prof.) on the estimation of 
magnesia, 382. 
Scherer (Dr.) on xanthine and leu- 
cine, 213. 
Schiel (Dr.) on the action of chlorous 
acid on various organic substances, 
120. 
Schmidt (Prof.) on the action of 
arsenious acid when introduced into 
the circulation, 214. 
Schonbein (Prof.) on the action of 
platinum-black on peroxide of hy- 
drogen, 280. 
Schwanert (M.) on derivatives of 
hippuric acid, 119. 
Seismometer, description of a new, 
102. 
Selenium, on the nitride of, 277. 
Silicates, on a new method of decom- 
posing, 382. 
Silicie acid, on the different states of, 
32: 
Silver, on the action of light on the 
chloride of, 186. 
Simpson (Dr. M.) on the action of 
acids on glycol, 69. ~ 
Sonorous undulations, on the mode of 
transmission of, in the human ear, 
56. 
Sound, on the velocity of, 449. 
-figures, on a new kind of, 324. 
Spectra of coloured flames, experi- 
ments on the, 193. 
Spectrum, on the law of the wave- 
lengths corresponding to certain 
points in the solar, 437. 
Spheres, on the motions and collisions 
of perfectly elastic, 19. 
Spiller (J.) on the composition of the 
photographic image, 186. 
Spratt (Capt.) on the freshwater de- 
posits of Bessarabia, 160. 
Stadeler (G.) on the occurrence of 
urea in the organs of the Plagi- 
ostomous fishes, 79; on acetone, 
118. 
Stars, instructions for the better ob- 
servation of the scintillation of, 216. 
Steam-engines, on the thermo-dyna- 
mic theory of, 460. 
Stereographic projection of the sphere, 
on the employment of the, in ery- 
stallography, 325. 
Strecker (Dr.) on vulpic acid, 211; 
on new derivatives of alloxan, 286. 
Stiirzwage (Dr.) on the effects pro- 
475 
duced by the administration of 
arsenious acid, 214. 
Suilivan (Prof. W. K.) on some pris- 
matic forms of calcite, 333. 
Sulphur compounds, on new, 283. 
Sun, on a mode of deducing the 
absolute temperature of the sur- 
face of the, 338; on phenomena 
observed during total eclipses of 
the, 416. 
Tartaric acid, on the optical proper- 
ties of artificial, 126; on the forma- 
tion of, from milk-sugar, 390. 
Tate (T.) ou the construction of cer- 
tain new forms of thermo-baro- 
meters, 1; on anew instrument for 
the mechanical trisection of an 
angle ; and on the multisection of 
an angle, 261. 
Telegraphic cables, on the deposit of 
submarine, 345, 
Thermo-barometers, on the construc- 
tion of certain new forms of, 1. 
Thermophyllite, on the doubly re- 
fractive character of, 330. 
Thiobenzoic acid, on the preparation 
and constitution of, 283. 
Thomson (Prof. J.) on some proper- 
ties of ice at or near its melting- 
point, 391. 
Toynbee (J.) on the mode of trans- 
mission of sonorous undulations in 
the human ear, 56 
Troost (M.) on the specific gravities 
of certain vapours at high tempera- 
tures, 207. 
Tuson (R. V.) on a carbonate of lead 
from leaden coffins, 291. 
Tyndall (Dr.) on the transmission of 
radiant heat through gaseous bodies, 
60; on the influence of magnetic 
force on the electric discharge, 239. 
Ufer (M.) on the nitride of chromium, 
278. 
Uloth (M.) on ericinone, 51. 
Urea, on the occurrence of, in the 
ar of the Plagiostomous fishes, 
a: 
Vapour densities, on certain, 207. 
Veatch (Dr. J. A.) on the occurrence 
of boracice acid in the sea-water of 
the Pacific, 323. 
Voltaic batteries, on the use of in- 
soluble compounds in, 404; on the 
use of sulphate of lead in, 469, 
Vowel sounds, on, 81. 
