

X CONTENTS. 



V. On Sulphuret of Lime to be ufed as a Subftitute for Potafh in Bleaching 

 with the Oxygenated Muriatic Acid. By Mr. William Higglns, M.R.I. A. 

 and Profeffor of Chemiftry and Mineralogy at the Repofitory of the Dublin 

 Society - - .... p. 253 



Preparation of tlie fiilpVuret of lime. Inftruflions for ufing it in bleaching. Documents by which 

 the advantages and economy of this method are fhewn. 



VI. On the Decompofition of the Acid of Borax, or Sedative Salt. By Lau- 

 rence de Crell, M.D. F.R.S. London and Edinburgh, and M.R.I.A. Tranllated 

 from the German - - - - P* 257 



Account of a procefs in which the acid of borax was treated by long- continued digeftion with the 

 oxygenated muriatic acid and repeated diftillations. 



yil. Reflexions on the Qiialitics of Pottery, with the Refults of Ibme AnalyfL-s 

 of Earths and of common Pottery. By Cit. Vauquelin - p. 262 



Concerning the efFefts of the feveral earths in the compofuion of pottery ; their mechanical divifioii ; 

 the requifite heat of firing, and proper coating or glaze. Component parts oi eight different articles 

 or materials of pottery. 



VIII. Defcription of a Thermometer which marks the greatcfl Degree of Heat 

 and Cold from one time of Obfervation to another, and may alfo regifcer its 

 own Height every Inftant. By Alexander Keith, Efq. F.R.S. and A.S. Edin- 

 burgh - - - - " P* ^64 



Thermometer with a float which either raifcs or tleprefles two fmall index pieces, or regulates a pencil 

 for tracing the temperature on the face of a cylinder moved by clock-work. 



IX. On the Effc<fls of apparent Attraftion or Repulfion, between Bodies floating 

 on or immerfed in Fluids. By M. Monge. - - p. 269 



Einimeration of the fafls in which floating bodies either rufh together, or are feparated, in confequence 

 of the fluid which is adherent to them, or made to form a cavity by repulfion. Inveftigation of 

 the caufes, with remarks and applications to certain phenomena in chemiftry. 



X. Obfervations on the Proportion of real Acid in the three ancient known 

 Mineral Acids, and on the Ingredients in various neutral Salts and other 

 Compounds. By Richard Kirwan, Efq. LL.D. F.R.S.. and M.R.I.A. (Con- 

 tinued fronv page 2 15) - - - . 'S?''^1Z 



Inftroclions for the ufe of the tables. 



XI. Experiments on certain Principles obtained from Animal Subfl:anGes treated 

 with the nitrous Acjd. By Cit. Welter - - - P- ^77 



XII. A fliort Account of the Life and Writings of DefauflTure. By A. P. De- 

 candole - - - - - p. 278 



Scientific News. Accounts of Books,, 8cc. . . _ p. 282 



On Steaiti. Univerfal Writing, French Weight* and: Meafures. Royallnftltution. ICirwan's Effays. 



Oaobei 

 3 



