- 
I-N DE xX, 
"The bad effect of roots is overbalaneed by the plant, = 
Spe F 54.—Their deleterious insioesice upon the air 
~ checked by cold-weather, p. 288, - 
Rufoes. Their faculty of correcting bad a air, exp. 58. 
Air of theme ee aie > exp, 2: 
S. 
Sabina yields dephlogifticated air by day, exp.64. 
Sage. See Salvia. 
Salvia. Its natural air is Common air, p. 26.—lIts air 
by night, exp. 37. ; 
Seadoe fare. A vulgar error among them about the 
a IEW, ss, the ami vent 
plants i in ‘ae room ee Filet, p- $1. 
Shade. Plants yield bad air in the thade, exp. O §. 
Skin. Air from our. fkin.is continually difeharged by 
way of an infenfible perfpiration, p. 129.—How it 
~ iluesy ps rz0—lts nature examined, p. 173.~~How 
tocollectit, p. 130.—Is of a poifoncus nature; £33, 
134.—Not better from young perfons; ee 
-. is mixed with atmofpheric air, p. 135+ 
Sparrs. s a ud — sino plats, p. 1221s 
chat tact 6f water, ibid, 
Springs” Difpofition. & the atmofphere in the fpring, 
p14 
ge 2 7 Spurge. 
