ii CONTENTS. 



O C TO B E R, 1803. 



Engravings of the following Objefts : 1. VelTel for inclofing Anatomical Prepa- 

 rations and other Objects ; 2. Cryftal of Eleftrical Calamine. By James 

 Smithfon, Efq. 3. Ciiraudau's Furnace for Evaporating by a regulated econo- 

 rnical Heat ; 4. Mr. Woart's cheap Method of Supporting decayed Timbers in 

 Buildings ; 5. Method of extreme Branch Grafting. By Wm. Fairman, Efq, 



I. Analyfis of the Egyptian Heliotropium, a Mineral lately imported from that 

 Country. By Frederick Accum, Praflical Chemift, and Teacher of Che- 

 miftry. Communicated by the Author. - - - -65 



II. Method of clofing wide mouthed Veflels intended to be kept from com- 

 municating with the Air. In a Letter from Anthony Carlifle, Efq. 68 



III. Extra6l of a Letter from Toulon to General le Vavaflcur, Infpeclor of the 

 Materials of the Guns of the French Navy, on the Changes which Caft Iron 

 undergoes byremaininglong in the Sea. - - - - 70 



IV. On the Antiquity of the Invention of Gun-powder, and its firft Applica- 

 tion to Military Purpofes. By Mr. Wiegleb. - - - 71 



V. A Chemical Analyfis of fome Calamines. By James Smithfon, Efq. 

 F. R. S. P. R. I. From the Philofophical Tranfaaions for 1803. - 74 



VI. Table of the Radii of Wheels, from Ten to Three Hundred Teeth. The 

 Pitch being two Inches. By Mr. B. Doukin, Millwright, Dartford, Kent. 86 



VII. Account of the Pyrometer of Platina. By Citizen Guyton. - 89 



Vltl. Letter from Mr. Ezekiel Walker on the Proportion of Light afforded by 

 Candles of different Dimenfions. - - - - - 90 



IX. On the Compounds of Sulphur and Oxygen. By Thomas Thomfon, 

 M- D. Le^urer on Chemiftry in Edinburgh. From the Author. 92 



IX. Further Experiments and Obfervations on the EfFcrvefcences of Walls. In 

 a Letter from Di;. Bollock. - - - - - 109 



X. Philcfbpliicai Obfervations on the Caufes of the Imperfeflion of evapo- 

 rating Furnaces, and on a New Method of conftrufling them, for the eco- 

 nomical Corabuftion of every Defcription of Fuel. By C. Curaudau, corref- 

 ponding Member of the Pharmaceutic Society of Paris. - 114 



XI. Corre^ion of a Milbke in Dr. Kirwan's Effay on the State of Vapour 

 in the Atmofphere. By Mr, Dalton. - - - - il8 



XII. Cheap and cfFeftual Method of fecuring Beams of Timber In Houfes or 

 elfewhere, which hnve been injured by the Dry Rot, or are decayed by Time. 

 By Mr. James Woart. - - - - - - 120 



XIIL Account of the Method of extreme Branch Grafting. By the Inventor 

 William Fairman, Elq. ---_,_ 124 



XIV. Obfervations on - feveral Pharmaceutical Preparations, by Cit. Stein- 

 acher, Druggift at Paris. Abridged by Citizen Parmentier. - 130 



Scientific News, 134. — Extraft of a Letter from Dr. Schaub to Mr. Parkinfon, 

 ib. — Meteoric Stones, 13!). — Abftraftof a Memoir on the Febrifuge Principle 

 of Cinchona, 136. — Query by a Correlpondent relpefling the Auguftine 

 Earth, 139.— Spaniard faid to refift high Degrees of Heat and ftrong chemi- 

 cal Agents, lb.— Method of giving Malt Spirits the Flavour of Brandy, 140. 

 —Preparation of a Lute proper for Chemical Operations. By C Payfle, ib.-^ 

 Two new Quadrupeds, 141. — Prefervation of Iron from Ruft. - 142 



Account of Books, 143.— Philofophical Tranfailions of the Royal Society of 

 London, for the_ Year 1803. Part I. 143— An ElTay on the Law of Patents 

 for new Inventions ; to which are prefixed Two Chapters on the general 

 Hiftory of Monopolies 5 with an Appendix. - - - 144 



NOVEMBER, 



