328 



INDEX. 



Bache, Prof., exhibits the changes of 

 magnetic variation on the two terms 

 of the German Magnetic Association, 

 of August 30 and November 30, 1S39, 

 151. 



on an instrument for measuring 



the vertical components of the force 

 of terrestrial magnetism, 311. 



— on a diagram exhibiting changes of 

 magnetic declination at Cambridge 

 and Philadelphia, 311. 



■ on Mr. Forshey's remarks on the 

 tornado of Natchez, 243. 



— on the meteors of the 12th, 13th, 

 and 14th of Nov. 1838, 60. 



— on a donation of transparent models 

 of crystals, by Prof. Alexander, 97. 



on a magnetic observatory to be 



erected at the Girard College, 118. 



presents No. 6 of the Society's Pro- 

 ceedings, 90— No. 7, 132— No. 8, 148. 



relates an instance of the rapid cor- 

 rosion of a chain cable in sea water, 

 70. 



— reports the deaths of M. Stainsby 

 and of Dr. Van Marum, 48. 



i ■ ' ' on shooting stars, 69. 



on shooting stars of Nov. 1840, 299. 



Balbo, Count Prospero, of Turin, his 



death announced, 74. 

 Barium, laid before the Society by Dr. 



Hare, 104. 



— extrication of, 130. 



Barometer, standard, constructed by Mr. 



Green, 320. 

 Bessel, M., investigates the parallax of 



the star 61 Cygni, 78. 

 Bills of credit, continental, Mr. Breck 



on the, 235, 248. 

 Blind, thin sheets of lead used by the, 



in writing, &c, 98. 



• Institution, use of the wax tablet 



and iron stylus in the, 94. 

 Blood, fluid 15 hours after death, which 



subsequently coagulated, 216. 

 Blowpipe, compound, of Dr. Hare, re- 

 marks on the, by Dr. H., 59. 

 Blumenbach, John Frederick, his death 



announced, 188. 

 Blunt, Mr. E., on the solar eclipses of 



May 14, 1836, and Sept. 18, 1838, 



177. 

 Bonaparte, Lucien, Prince of Canino, 



his death announced, 276. 

 Bond, Mr. W. C, chart of extraordinary 



variations of magnetic declination at 



Cambridge on May 29, 1840, 293. 

 Bonnycastle, Mr., on the insufficiency of 



Taylor's theorem, &c, with remarks 



on the development and continuity of 



functions, 214, 227 

 on a new principle in regard to 



fluids in motion to produce rupture of 



the vessels, &c, 191. 



Bonnycastle, Mr., notes of experiments 



to determine the depth of the sea by 



the echo, 39. 



his death announced, 295. 



Bowditch, Dr. N., his death announced, 



10. 

 bust of, directed to be purchased, 



80. 

 family of, to be furnished with the 



Transactions of the Society, 117. 

 Boye, Mr. M. H. See Rogers, Prof. H. D. 



and Mr. Clark Hare, on perchloric 



ether, 261,319. 



Bradford, Mr. Thomas, his death an- 

 nounced, 16. 



Breck, Mr. historical sketch of the con- 

 tinental bills of credit, from 1775 to 

 1781,235,248. 



By-laws in regard to the contribution of 

 members, 95. 



Calcium, brilliant metallic spangles of, 



83. 



extrication of, 130. 



portion of, laid before the society 



by Dr. Hare, 104. 



recent experiments to obtain, 100. 



Capillary action, phenomenon of, 82. 

 Carbonic acid, solidification of, by Dr. 



Mitchell, 15. 

 Carey, Mr. Matthew, his death an- 

 nounced, 117. 



obituary notice of, directed, 117. 



Cecidomyia Destructor, Miss Morris on 



the, 2a2, 318. 

 Ceraphron Destructor, Miss Morris on 



the, 282, 318. 

 Chapman, Dr. announces the death of 



Mr. Matthew Carey, 117. 



announces the probability of ob- 

 taining the correspondence of Robert 

 Morris, &c, 209. 



on a presumed earthquake, Nov. 



14, 1840, 301. 



presents meteorological observa- 

 tions, given by Mrs. Madison, 117. 



letter to, from the Prince of Musig- 



nano, inviting the Society to send a 



delegate to the meeting of scientific 



men at Pisa, in Oct. 1839, 108. 

 Chemistry, communications relative to, 



by Dr. Hare, 61. 

 Chinese system of writing, Rev. Mr. 



Dickinson on the, 200. 

 Messrs. Gutzlaff, and Du Ponceau 



on the, 120. 

 Chlorine, mode of preparing, in Dr. 



Hare's self-regulating reservoir, 160. 

 Climate of the Atlantic States, Dr. Hare 



on the, 187. 

 Coates, Dr. announces the formation of 



the Pathological Society, 139. 

 Coins and Medals, presented by Col. 



Linah, report on the, 70. 



