SCIENTIFIC NEWS. 301 



SCIENTIFIC NEWS. 

 PROFESSOR DANZEL of Hamburgh made, in the be- Mechanifm for 



/• i r, r i • . r .i l -r directing aerofta- 



ginning of laft year, a fecond experiment of the mechanitm cic ma( . hineS , 



he has invented for the direction of aeroftatic machines. He 



is faid to have obtained a progrefs, in a right line, of twelve 



feet in a fecond, which is nearly equal to three leagues in an 



hour, although he did not bring more than half his means into 



aelion. On the fame day he made an effay with another 



machine for the fame ufe, the refult of which was not leis 



fuccefsful. He has fince publiflied the principles of his 



ditcovery in a pamphlet, entitled, " Bafts of the Mechanifm 



for the Direction of Aeroftatic Globes, by Profeffbr Danzel, 



of the Society of Emulation of Abbeville, at Hamburgh." 



The clafs of phvfical and mathematical fciences of the Correspondents 

 National Inftitute of France, in its fitting of 2d Pluviofe, in eleiled by the 



° clafs of phyfical 



the year XII. elected the following correfponding members, and mathematical 

 Metfrs. Leblond, engineer, returned from Cayenne ; Bernard, fciences of the 



in ™ i' CT . i r - French national 



engineer and aftronomer, at Bagnols ; bimons, phyfician at inftitute. 



London; Crell, German ehemift; Thunberg, the (ucceffor of 



Linnaeus in Sweden, who made the voyage to Japan ; Bugge, 



aftronomer to the king of Denmark; Goffe, ehemift at 



Geneva; Prouft, ehemift at Madrid; Cugnoli, aftronomer 



at Modena ; Reboul, to whom we are indebted for themeafures 



made in the Pyrenees ; Mendoza, a Spaniard, fettled at 



London, known by his important works on navigation. 



They were all correspondents of the Academy of Sciences 



in 1793. 



The fame clafs has prolonged the time for receiving anfwers Prize queftiona, 

 to the following prize queftions, until the lft Germinal, in 

 the year XIII. '* To determine by experiment the different 

 fources of carbon in vegetables." And, " To determine 

 by anatomical and chemical obfervations and experiments, 

 what are the phenomena of the torpidity which certain 

 animals, fuch as marmots, dormice, &c. experience during 

 the winter, with refpecl to the circulation of the blood, 

 refpiration and irritability ; to enquire what are the caules 

 of this fleep, and why it is peculiar to thefe animals." 



The value of the prizes is doubled, and confifts of two 

 kilogrammes of gold, about 233/. fterling each. 



Theaftronomical prize, inftituted by M. de Lalande, to i e 

 given to the perfon, in France or elfe where, the members of 



the 



