336 JLxperhunh an Hats deprived of Sight. 



flight as any other animals of the fame fpecies which enjoy 

 the ufe of their eye-fight. 



. M. Spallanzani tried the fame experiments with the fame 

 refult on the eyes ®f the horfe-fhoe bat (vejpert.ferrum equi- 

 numj, the dwarf-bat, the great bat (noclula), and the bat of 

 Buffon. M. Spallanzani is convinced that the other four 

 fenfes frill remaining to thefe animals cannot fupply the 

 want of fight; and he is therefore of opinion that a new 

 organ, perhaps a neivferfe, which is wanting in the human 

 fpecies, may in them be put in aclivity by their being blind- 

 ed. PrcfefTor Vafalli at Turin, ProfefTor Roffi at Pifa, 

 M. Spadone at Bologna, and M. Jurinc at Geneva, repeated 

 thefe experiments, and obfervcd the fame ohenomena as thofe 

 mentioned by Spallanzani. 



VI. 'Experiments on Bats deprived of Sight by M. DE JuRINE. 

 Front the Journal de Phyfiqueybr 1798. 



X HE experiments of M. Jurine were made only on the 

 long-eared bat {vcfpertilio aurilus), arid the horfe-fhoe bat 

 (vefpert. ferrum equinum). The bats were procured from the 

 vaults under the fortifications of Geneva in the months of. 

 December and January. The author firft obviates fome 

 doubts refpefting the places where thefe animals rcfide in 

 winter, as fome of them have been found in a torpid flate 

 in the trunks of old trees during that feafon. 



The author obferves, that he found at the above feafon, 

 and in the fame vaults, abundance of moths {phalanx) and. 

 crane-flies {tipulfs), and thinks he here difcovers one" of thofe 

 wife difpenfations of nature, by which other animals of more 

 utility find a fource of aliment when they could procure 

 nothing in the atmofphere at that rigorous feafon. 



The long-eared bat has fix incifive teeth in the under jaw, 

 three-lobed, and cut into the form of a heart. The upper has 



four, 



