I - N D E X. 



Newton (Sir Isaac) miftaken in his conjefture concerning 



the colours of the clouds at fun-rifing and fun-fetting, 75. 

 Nephritic convulfion&, 412. 



O. 



Opium, experiments made with it on animals, 280. 



' .. ■ -deftroys all feeling and powerof motion in animals, 301. 



— does not produce its efFefts by compreffing the brain or 



bringing on fieep, 313. 



-its efFefts, not owing to any fubtile effluvia fent to the 



brain or mufcles, but folel) to its aftion on the nerves to 



which it is applied, 302. and 308. 

 • — kflls frogs fooner than the deftrudlion of their brain and 



1 fpinal marrow, 304. .'»■-' V'"-'". 



' kills dogs fooneft when injefled into the cavity of their 



abdomen, 306. 



deftroys the irritable power of the mufcles, 310. 



■ retards and at laft puts a flop to the motion of the 



heart; ^ccjrl '<* "'-^^K 



the way in which it kills animals, 314. 

 Ovarium, of a woman, bones found in it, 273. 



P. 

 Parallaxes of t)ie moon, an eafy method of computing them, 91. 

 Peat, its analyfis, 226. 



" its ufe^,,, 231. 



Philofopers, a miftake of many of them, 22. 



Planets, why they appear white, 72. 



Plant, a defcription of a new one, 1. 



Pringle (James Efq;) on the eiFefts of raufk in the gout in 



the ftomach, 250, 

 Procidentia ani, remarks On its cure, 354. 



CL 



Quantity, its endlefsdivifibiiity afierted againft feme Sceptics, 71. 

 Qjjeries concerning light, colours, and coloured bodies, 59. 



Quick- 



