ACCOUNT OF NEW BOOKS. 2;23 



5. An Account of a curious Phenomenon obferved on the Phllofophical 

 Glaciers of Charaouny ; together with fome occafional Obfer- ^^^"^^'^^"s^f 

 rations concerning the Propagation of Heat in Fluids ; by ciety. 

 Benjamin Count Rumford, V. P. R. S. Foreign Affociate of 

 tlie National Inftitute of France, &c. &c. 4. Defcription of 

 a triple Sulphuret of Lead, Antimony, and Copper, from 

 Cornwall ; with fome Obfervations upon the various Modes 

 of Attradlion which influence the Formation of Mineral Sub- 

 ftances, and upon the different Kinds of Sulphuret of Copper; 

 by the Count de Bournon, F. R. S. and L. S. 5. Analyfis 

 of a triple Sulphuret of Lead, Antimony, and Copper, from 

 Cornwall, by Charles Hatchett, Efq. F. R. S. 6. Obferva- 

 tions on the Orifices found in certain poifonous Snakes, fitu- 

 ated between the Noftril and the Eye ; by Patrick RuflTell, 

 M. D. F. R. S. : with fome Remarks on the Strudure of 

 thofe Orifices, and the Defcription of a Bag connected with 

 the Eye met with in the fame Snakes ; by Everard Home, 

 Efq. F. R. S. 7. An Enquiry concerning the Nature of 

 Heat, and the Mode of its Communication ; by Benjamia 

 Count Rumford, V. P. F. R. S. Foreign AiTociate of the 

 National Inftitute of France, &c. 8. Experiments and Ob- 

 fervations on the Motion of the Sap in Trees ; in a Letter 

 from Thomas Andrew Knight, Efq. to the Right Hon. Sir 

 Jofeph Banks, Bart. K. B. P. R. S. Appendix, Metereolo- 

 gical Journal kept at the Apartments of the Royal Society, by 

 Order of the Prefident and Council. 



Analytical EJfays toivards promoling the Chemical Knotolcdge of 

 Mineral Suhfiances. By Martjn Henry Klaproth, 

 Profejfor of Chemifiry, Ajffjfcr to the Royal College of Phy- 

 ficians. Member of the Royal Academy of Sciences at Berlin, 

 and various other learned Societies. Vol. II. 8»o, 267 Pages. 

 Tranjlatedfrom the Gennan. Cadell and Davies. 



THIS work is tranflated by the fame learned chemift to Analytical 

 whom the fcientific world is obliged for the former volume. SlTays, 

 Its valuable contents are as follow. 73. Examination of the 

 Auriferous Ores from Tranfylvania. 74. Analylis of the 

 fulphated Oxyd of Manganefe from Tranfylvania. 75. Exa- 

 mination of Tungftate of Lime (Scheeluim). 76. Gadolinite. 

 77. Examination of the Egyptian Natrum (Soda). 78. Stri- 

 ated 



