CONTEXTS. 



XVT. On the Bite nf a Snake cured hjj f'ljla/Ue Alkali. Bij 

 David Ramsay, M. D Page 1 25 



XVII. Letter to Dr. Ramsay, in consequence of hh Ob- 

 servations on the Bite of a Snake curri by Folaiile yll- 

 kali. Bi/ Bfnjamin' Barton, M. D 128 



XV III, Anahjsis of Ambergris. Bij Bouillon-Lagrange 



XIX. Observations on the Eniphj/vicnt of Platina in Porce- 

 lain Painting. By Professor Klaproth, of Berlin 135 



XX. Advantageous JSIethod of preparing Red Oxide nf 

 Quicksilver. By J. W. C. Fischer 139 



XXI. A Memoir concerning several indigenous Plants, which 

 may serve as a Substitute for Oak Bark, and for certain 

 foreign Articles in the Tanning of Leather 140 



XXI I. Process for Dyeing Nankeen Colour. By Mr. Richard 

 Brewer 149 



XXni. On the Benzoic Acid in the Urine of Horses. By 

 _ M. Ferdinand Giese, of Berlin 151 



XX I \^. On some Properties of the Phosphoric yleid not yet 

 sufficiently known. By M.J.¥.GvE.RSE^,y1pothecary of 

 Kiel 150 



XXV. Description of a New Safety- Piston for Papin's 



, Digester, uith the Application of it to the Boilers of 

 ■Steam-Engines, and also of an Apparatus for regulating 

 the Heat of Furnaces. By A. N. F.delcuantz, Knight 

 of the Swedish Order of the Polar Star, and Member of 

 several Academies and Jjearned Societies 162 



XXVI. Description of Mr. Arthur Woolf's Steam- 

 I'alue 1 64 



XXVII. Description of a Portable Chamber Blast-Fur nuce. 

 By C. K. AiKiN, ii.scj. . . , 166 



XXVIII. On the Preparation of the Fulminating Mercury 

 of Mr. Howard, by Mr. A. S. Rurkitt I69 



XXIX. Tenth CovLnmnicalionfrovi Dr. Thornton . . 171 



XXX. Mr. Close's Communication to the Board of Agri- 

 culture 178 



XXXI. Proceedings of Learned Societies , 186 



XXX IT, Intelligence and JSFiscellaneous Articles 188 



XXXIII. On Gems. By W. H, Pepys, ,;w«. Esq. P. R. L 

 Member of the Asktsian Society. Read in the Session 

 J 80i?-3 193 



XXXIV, Of the general Relation between the Specific Gha- 

 I'.'ties qnd the Strengths and Falues of Spirituous Liquors, 

 qnd the Circi'oistances Inj (vhich the former are inftuevced 



204 



2^XXV, On the Preparation of Indian Ink; (rrescnling an 



fqiy and expeditious Method of providing a Substitute 



possessing 



