ii CONTENTS. 



FEBRUARY 1802. 



Engravings of the following Objects : I. The Method of making Gun-Flints } 

 2. Structure of the Human Earj to illuftrate the Cure of a Species of Deaf- 

 nefs ; 3. The new Apparatus for bleaching the Materials of Paper. And, 

 4. The Graphometer tor measuring Cryftals j Dr. Thomfon's Apparatus for 

 alcertaining whether Fluids move by change of Temperature ; and fome Appa- 

 ratus for fhewing the Electricity afforded by Contact of Metals. 



I. On the fuppofed Currents in hot Liquids. By Thomas Thomfon, M. D. 

 Lecturer on Chemiftry in Edinburgh. From the Author. Page 81 



II. A Memoir on the Art of making Gun-Flints. By Citizen Dolomieu. 88 



IU. Letter from Dr. Beddoes on Prognoftics of the Weather, the Effects of the 

 Nitrous Oxide, and other Objects. - - 98 



IV. On the Quantity of Nutriment to be obtained from various Kinds of Bones, 

 and the beft Method of extracting it, by ProfefTor Prouft. - 100 



V. Obfervations on the Effects which take Place from the Deftruction of the 

 Membrani Tympani of the Ear j with an Account of an Operation for the 

 Removal of a particular Species of Deafnefs. By Mr. Aftley Cooper. 102 



VI. Note reflecting the Abforption of Nitrous Gas, by Solutions of Green 

 Sulphate and Muriate of Iron. By Mr. H. Davy, Director of the Laboratory, 

 and Lecturer on Chemiftry to the Royal Inftitution. — (From the Author.) 107 



VII. On certain Metallic Sulphurets. By Prouft, ProfefTor of Chemiftry at 

 Madrid - - .... 109 



VIII. A Memoir on the Method of Bleaching the Pafte of Paper. By Cit. 

 Loyfel. - - - - 118 



IX. On the Sound produced by a Current of Hidrogen Gas paffmg through a 

 Tube. With a Letter from Dr. Higgins, relpecting the Time of its Difco- 

 very. - - - - 129 



X. Defcription of the Graphometer, or Inftrument of Cit. Carangeau, for mea- 

 suring the Angles of Cryftals. — From the Mineralogie of Cit. Hauy. 132 



XI. Letter of ProfefTor Volta to J. C. Delamethrie, on the Galvanic Phenomena. 



135 



XII. An Account of a Method of Conftructing Simple and Compound Galvanic 

 Combinations, without the Ufe of Metallic Subftances, by Means of Charcoal 

 and different Fluids. By Mr. Davy. - - 144 



XIII. Short Analyfis of the Principles and Structure of Mr. Clofe's Hydraulic 

 Engine— W. N. - - - 145 



XIV. Simple Procefs for taking a Copy of a Recent Manufcript. Communi- 

 cated to the Philomathic Society at Paris. By Charles Coquebert. 147 



XV. Narrative and Explanation of the Appearance of Phantoms, and other 

 Figures in the Exhibition of the Phantafmagoria. With Remarks on the Phi- 

 lofophical Ul'e of Common Occurrences. — W.N. - ib. 



Scientific News. Extract of a Letter from Doctor Lorenz De Crell. — Corrin- 

 don or Adamantine Spar found near Philadelphia. — Nature of the Earth- 

 which is eaten by the Inhabitants of New Caledonia. — Account of a blue 

 Oxide of Iron. — Ufe of Whifkers in certain Quadrupeds. — Galvanic Charge 

 of a large Battery by the Metallic Pile. - - 151 to 154 



Acconnt of Books of Science. Davy's Syllabus of a Courfe of Lectures on 

 Chemiftry — Kelly's Elements of Book-keeping — Memoir fur Tlnfluence de 

 I* Air, &c. — Memoirs d'Agriculture, &c. - - 155 to 139 



Books imported - - - 160 



MARCH 



