Cbcmijlrj. — Excrement of PLmls. 3T9 



MISCELLANEOUS, 



CHEMISTRY. 



THE following procefs for preparing aurum majivam of a 

 moft beautiful quality has been announced by Brugnatelli : 

 Precipitate a folutionof the nitrat of tin by liquid fulphure of 

 potafli, dry the precipitate and put it into a retort with half 

 its weight of fulphur and a quarter of the muriat of am- 

 monia; you will then find the fulphure of tin formed at the 

 bottom of the retort, and of a moft brilliant appearance. 



In a former Number of this Work (Vol. II. p. 331), when 

 laying before our readers an account of the prefent ftate of 

 Chemiftry in Germany, we mentioned the favourable ac-. 

 count given by M. Van Mods of Bruficls, of the Elementary 

 Trcatife on Chemiftry publifhed by Profeflbr Gren, whofe 

 death we announced in our Lift Number. A letter which 

 we have fince received from M. Scherer of Weimar, fpeak- 

 ing of Mr. Gren's death and of his writings, fays, " His 

 Syftem of Chemiftry, on account of its perfpicuity and cor- 

 rectnefs, has obtained in Germany a decided preference over 

 every other elementary work of the kind." This work we 

 are happy to find has been tranflatcd into Englifh, and will 

 foon be publifhed in 2 volumes 8vo fize. It contains all the 

 facls relating to chemiftry known up to 1796, as far as they 

 corae within the eompafs of an elementary trcatife, explained 

 on the principles of the new theory. The few difcoverie? 

 fince made have, we underftand, been added by the tranf- 

 lator in occafional notes ; and, at. the end, an account of the 

 two new metals, Tellurium and Chrome. 



i:XCU E U E 8 T O i- PLANTS. 



Brugmanns, in a differtation on lolium * (dame 1 ), 

 was the firft who proved that plants, like animals, free 



* DUTcrtatio de lolio, ejufdeth^ue varia fpecic, noxa et ufu, 1-7R5. 



them- 



