Scientific Intelligence, Sfc. 159 



fused easily before the blowpipe into a white opaque globule. Hence 

 he concluded that they consisted of neutral phosphate of lime. — Jour, 

 de Chim, Med. i., 179. 



XX. — Two Concretions found in the knee of an Old Man, 



Anthritic concretions were found by Dr. WoUaston to consist of 

 urate of soda, while some, according to Guyton and Fourcroy, were 

 composed of phosphate of lime. M. Lassaigne had two sent him 

 which were taken from the knee of a man aged 70. One of them 

 weighed 2;^ grains. It was insoluble in cold or hot water and 

 in alcohol. Caustic potash had no action upon it. When heated 

 with nitric acid no colour was produced indicating the absence of 

 uric acid, which was also proved by the negative action of potash. 

 Muriatic acid dissolved it partly with slight effervescence, leaving 

 a white opalescent animal matter, which, when submitted to the 

 action of boiling water, was transformed into gelatine. 



Ammonia precipitated from the muriatic acid solution, gelatinous 

 flocks of phosphate of lime. The remaining liquid afforded a preci- 

 pitate with oxalate of ammonia indicating the presence of lime, 

 which had existed in the concretion in the state of carbonate. The 

 concretion was analyzed quantitavely by calcining a portion, dissolving 

 the residue in muriatic acid, and precipitating the phosphate of lime 

 by ammonia. The constituents are, 



Animal matter soluble in boiling water 37*2 



Phosphate of lime . 49-9 



Carbonate of lime 12*9 



1000 



XXI. — Analysis of Copper Pyrites. By Mr. Thomas 

 Richardson. 



Specific Gravity . . 4*166 

 Sulphur . 34-70=2-12 atoms. 

 Copper . 32-75=l-00 

 Iron . . 32-80=l-14 



100-25 



^'Xll.— Notices of New Boohs. 



Mr. John Weale, Architectural Library, will shortly publish a 

 Supplementary Part to the original Edition of STUART'S 

 ATHENS, containing the very curious plate wanting in the second 

 volume of all the copies extant, together with several other plates 

 from drawings by Sir J. L. Chantrey, &c. 



SCIENTIFIC MEMOIRS; selected and translated from 

 Foreign Journals, and from the Transactions of Foreign Academies 

 and Learned Societies : Edited by Richard Taylor, F.L.S., G.S., 

 and Astr. S. 



