CONTENTS. 



XV. Letter fr(Tm Dr. Mitch ill, of New-York j Represen- 

 tatice in Congress, <^c. to Benjamin Mosely, M. D. 

 &fc. containing some interesting Particulars in the Histortj 

 of JSluriate of Soda 97 



XVI. Biographical Memoirs o/" Peter J'rancis BEaNiEU, 

 who accompanied Capt. Baudin, as Astronomer, on his 

 Voyage of Discovery. By Lalande 103 



XVII. ylccoimt of the Foyage undertaken by the Spaniards 

 to tlie North-Jpest Coast of America in the Year 1792 



106 



XVIII. Ostcological Description of the o?ie-horned Rhino- 

 ceros, ly Cu viEii 1 11 



XIX. Ohservatio7is on the Electricity of Metallic Substances. 

 By M. Hauy 12a 



XX. Obseri'a lions on Tea, 5?/ Desfontaines .... 123' 



XXI. On a Liquid Sulphur. By Professor Lampadius 



131 

 XXIT. Experiments to ascertain ichcther there exists any 

 Affinity betwixt Carbon and Clay, Lime and Silex, se- 

 parately or as Compounds united with the Oxide of Iron 

 forming Iron Ores and Iron Stones. By David Mushet, 

 Esq. qj' the Colder Iron-JVorks 134 



XXIII. On Prussiate of Copper 142 



XXIV. Second Letter to Mr.'TiL-LOCu on the Cow-Pock^ 

 from Dr. Thornton, being a Comparison of the Cotu- 

 ^Pcck u'ith the Small- Pox " 143 



XXV. Seventeenth Convmunication from Dr. Thornton, 

 relative to Pneumatic JSIedicine 133 



XXVI. On Cerium, a new Metal found in a Mineral Sub- 

 stance of Bastnas in Sweden, called Tungsten, described 

 by W. D'HisiNGER and J. B. Berzj-lius 134 



XXVn. Method of giving the Grain and Hardness of Steel 

 to Copper. By B. G. Sage ; 1 ,09 



XXVIII. On Phosphoric Acid and Phosphor7is. By Jos. 

 IIuME, Esq ; iCO 



XXIX. On two Metals, fou. id in the black Poivder remaining 

 after the Solution of Platina. By Smithson Tennant, 

 Esq. F.R.S .■ 162 



XXX. On a new Metal, found in crude Platina. By 

 William Hyde VVollaston, M. D. F. R, S. . . 168 



XXXI. N^otices respecting New Books 176 



XXXII. Proceedings of Learned Societies 177 



XXXIII. Intelligence and Miscellaneous Art'cles .... 179 



XXXIV. Concerning the Analytical and Synthetical Modes 

 of Reasoning made use of in Mathematics and other 

 Sciences. By the Rev. John Toplis, A.M 193 



xx,x.y, 41^ 



