INDEX. 



Lenfes, the various forts defcribed, 37 ; their ufes 3 38, 39, 40. 

 Lanthorn, added to the lucernal microfcope, 67. 

 Lamp, Argand's, defcribed, 70. 



Lyonet's anatomical microfcope defcribed, 114; his mode of 



preparing objects, 138, 139. 

 Libellula defcribed, 231 ; its eye defcribed, 382, 

 Lepas anatifera defcribed, 359. 

 Leucofpis dorfigera defcribed, 385^ 

 Lobfter infecl defcribed, 386. 

 Loufe defcribed, 698. 

 Lump-fiftv fkin of, 388^ 



M* 



Microfcopes, firfl invention of, 1 ; claimed by the Dutch and: 

 Italians, ibid, their Life, 2; made by Zacharias Janfen and his. 

 Son, ibid, defcription of one defcribed by Aepinus, 3 ; known' 

 to the Greeks and Romans, ibid, fingle microfcope defcribed,, 

 5 ; further explained, 44 ; magnifying power of," 45 ; impro- 

 ved, by Lieberkuhn, 65; ditto by Leeuwenhoeck, 7; final I ■ 

 glafs globules ufed infiead of convex lenfes, 8 ; globules of. 

 water, ditto, 13 ; two drops of water, 14 ; compound of Dr. 

 Hooke defcribed, 16; Euftachio Divini's ditto, 16; Philip 

 Bonnani's ditto, 17 ; compound, improved by Dr. Robert 

 Barker, 18; by Dr. Smith, 18; explained fully, 46 ; folar, 

 invented by Lieberkuhn, 19- explained, 49; fully defcri- 

 bed, 99 ; lucernal, invented by G. Adams, 22 ; it's peculiar 

 advantages,. 65, 67 ; fully defcribed, 67 ; ufed as a folar, 78 ; 

 Delebarre's, 23 ; the different forts referred to, 24 ; their mag- 

 nifying power, 53; Cuff's double-conflrucled defcribed, 80;. 

 Adams's improved double and fmgle, 83 ; improved com- 

 pound?. 



