104 Gcrmaiiy. — Injlltiite of Cairo. 



beneficial to bark the trees before they are cut, and in what 

 manner is that operation to be performed ? The anfwers to 

 thefs queftions muft, as far as poffible, be confirmed by ex- 

 periments. If the author fupports any of his obfervations 

 on the authority of foreign pubUcatious, he muft be careful 

 to refer to them in a marginal note. The papers may be 

 •vX'ritten in Danifli, German^, French or Englifli, and muft be 

 tranfmitted to the Society before the month of Odlober next. 



GERMANV. 



The following queftion in economics has been propofed 

 by the Royal Society of Gottingen : Has inoculation of the 

 fmall-pox in flieep been attended with any real utility ? does 

 it fecure them againft infeftion ? and what rules are to be 

 cbferved refpefting it ? The Society wiflies that the anfvvcra 

 to this queftion may be confirmed by undoubted experiments. 



The prize is twelve ducats, and the papers muft be tranf- 

 mitted to the Society before the month of September. 



PROCEEDINGS OF THE INSTITUTE OF CAIRO. 

 Frimaire i. Seventh Ytar. [A'av. 23, 1798.] 



A memoir by C. Corancez was read, in which the author 

 examined the means of remedying the alteration in the 

 movement of watches, occafioncd bv changes of tempera- 

 ture. He propofed, for this purpofe, that the balance fliould 

 be compofcd of difierent metals; and he examined by calcu- 

 lation what ought to be the form of the parts to render the vis 

 incrt'Ue conftant, while the ofcillating mafs dilates or contracts. 



C. Savigny read a memoir on the natural hiftory of 

 Kgypt, with an enumeration of the difierent fpecies of ani- 

 mals hitherto obfervcd in Lower Egypt, and particularly in- 

 fects. He pointed out alfo fome of the caufcs which may 

 have contributed to reduce the number of thefe fpecies. 



C. Sucy propofed the appointment of a commiffion for 

 the purpofe of collecting information from the inhabitants 

 of countries adjacent to Egypt, which might then be at 



Cairo^ 



