New Process for preparing Calomel, 9t 



proposed the application of this gas-light to ceconomical pur- 

 poses, and actually carried it into eftcct. In 1798 he also 

 cstahlished it on a larger scale at Messrs. Bolton and Watts, 

 Soho, Birniingham. But at Messrs. Phillips and Go's 

 cotton factory it has been carried to the highest degree of 

 perfection, and on the most extensive scale, of any place \i\ 

 the kingdom. From a statement of the relative expense 

 of candles and gas, it appears that for the light which that 

 manufactory required, 2000/. a year would be expended 

 in candles; whereas ihe wear and tear and expenses oF gas- 

 lights do not much exceed 600/. a year, amounting to about 

 one-third the expense of candles. . 1 



IMPERIAL ACADEMY OF SCIENCES AT ST. PETERSBURGlti^- 



'^This Academy has published the 13th volume of their 

 Memoirs, It coii tains, among other interesting articles, a 

 description of the celebrated silver mine of Zuseoff, ou 

 Mount Athol, in Siberia, with an account of the total pro- 

 duce of that mine from 1747 to 1793 inclusive. 



UNIVERSITY OF WILNA. ,j 



This body has announced the following as the subject of 

 a prize question : ^< What are the chief diseases of plants, 

 and what analpgy exists between them and those of ani-i 

 malsr" 



The prize is 100 ducats; and the memoirs, written in 

 Latin, French, or Polish, must be sent before the first of 

 September 1808 to the rector of the University, under 

 cover to Messrs. IJeiser or Karner, bankers in Wilna. The 

 prize will be adjudged in the month of January J8O9. 



" .-.; : ■ :-v' -r ' ',T. .f•:^f•^W):,-^.^^-^■^rt ""^^ 



XX r. Intelligence and Miscellaneozis Articles. 



NEW PROCESS tOT^ PREPARING CALOMEL. 



xjLn important improvement in the preparation of that es- 

 sential article of the pharmacopoeia, calomel, has been re- 

 cently introduced by Messrs. Luke Howard and company, 

 chemists. It consists in a peculiar mode of conducting the 

 final suliimation by fire; by which the vapour of the calo- 

 mel. 



