INDEX TO VOLUME XXVII. 



A. 



Acetic acid, crystallized, process for, 

 197. 



Aikin, W. E. A., on apparent diminu- 

 tion of weight in certain circumstan- 

 ces, 22i. 



Alexander, J. H., report on projected ge- 

 ological and topographical Survey of 

 Maryland, 1. 



Aluminium, chloride of, 241. 



, hydrated chloride of, 253. 



Amalgam ol plaiiuum, 263. 



Ammonia, bilungstate of, 264. 



Analysis of the berries of the Sumach. 

 294. 



Analysis of chloride of aluminium, 242 



chloriodide of platinum, 260. 



disulphuret of Bismuth, 265. 



Georgia gold, 255. 



silver of Lane's mine, 256. 



Antimonv, process for separating Irom 

 tin, 197. 



Apparatus for analyzing Calcareous 

 marl, &c , 299. 



Arch, rampart, some properties of, 303. 



Artesian wells, 399. 



Asclepias Syriaca, 384. 



Aurora borealis, efiect on magnetic nee- 

 dle, 113. 



B. 



Babbage, Chas., Esq., theory of the ele- 

 vation and depression of the earth's 

 crust by variations of temperature, as 

 illustrated by the temple of Serapis. 

 408. 



Bache, Prof A. D., on effect of Aurorn 

 borealis upon the magnetic needle. 113. 

 385. 



, mefeorol. observations on 



and about 13th Nov. 1834, 335. 



Balance, application of its principle to 

 various operatiops, 92. 



Ball's cave, notice of, 368. 



Barometer, improvement and new modes 

 of construction of, 97, 223, 292. 



Beads, manufactory of, at Venice, 78. 



Beecher, D. L., on snake suspended alive 

 bv spiders, 309. 



Bellows, theory of, 88. 



Berzelius' letter on analysis of gastric 

 liquor, 405. 



Treatise on Chem., remarks 



on, by Prof. Hare, 61. 

 Bi-malate of lime in the berries of the 



Sumach, 294. 

 Bismuth, disulphuret of, 264. 

 Bilungstate of ammonia, 264. 

 Brant, L. on the eclipse of Nov. 30, 1834, 



386. 



C. 



Carbonic oxide, 129. 



Caricography, Prof. Dewey on, 23C. 



Chapin, A. B., on junction of trap and 

 sandstone, 104. 



Chloriodide of platinum, analysis and 

 synthesis, 258. 



Chrysomela vitivora of Vol. 26, not a 

 new insect, 420. 



Combustion, spontaneous, 178. 



Copper, native, large mass in Y. C. Cab- 

 inet, 381. 



Croom, H. B., on organic remains of 

 marl pits in Craven Co., N. Carolina, 

 168. 



Crust of the earth, elevation and depres- 

 sion of, by variations of temperature, 

 408. 



Crust of the globe, progressive increase 

 of heat in, 397. 



Cummings, Judge S. on a snake suspend- 

 ed alive by spiders, 307. 



Cyana, fountain of, 82. 



Dana, Jas. D., on the condition of Vesu- 

 vius, July, 1834, 281. 

 De La Beche's manual, 3d ed., 412. 



researches on theoretical 



geology, 412 



Desfontaines, M., notice of life and wri- 

 tings, 201. 



Dewey, Prof C, on caricography, 236. 



Disulphuret of bismuth, 264. 



Donation to Y. C. Library, 184. 



Ducatel, Prof. J. T., report on projected 

 geol. and topog. survey of Maryland, 

 1. 



Durant, C. F., on improvement in the 

 barometer, 97. 



