I N D E X, 

 Old Age. If advantageous for old people to fleep with 



young, p. 135. 

 Orange-trees* Their danger if kept in a room, p. 67. 



P. 



Par/ley, its air-bubbles, p. 20. 



Pepper-mint, its faculty of fpoiling common air in the 

 ihade, exp. 4$.-— Its remarkable faculty of correcting 

 bad air, exp, 56, 



Peaches poifon common air, exp. 75 — 77. 



Pears fpoil common air, exp. 80. 



PerJicariaurenS) its remarkable faculty of correcting bad 

 air, p. 40. exp. 58. — Its air of the day and the night 

 together, exp. 54. — Its remarkable quality of poifon- 

 ing common air by night, p. 205. — Its power of chang- 

 ing inflammable air, and to make it explofive, p. 100 

 & feq. exp. io^, 107, 110,111, 118. 



Per/piration of air from our (kin, p, 1 29,, 



Phlogifticated air. What ? p. lv. 



Plate explained, p. 293. 



Plants yield dephlogifticated air by day, p. 14 — 41. and 

 bad air by night, p. 47. — Their power of correcting 

 bad air, p. 62. — Their power of improving common 

 air, p. 62. — Thrive better in foul air, p. 62. — The 

 reafon of this, p. 64.— Do not correct bad air by night, 

 exp. 57. 



Poifonous plants yield dephlogifticated air, p. 232. 



Z Pontine 



