7 I: Ne Re Rc © 
Helmont, Van, his gas /ylvefire, p. 112. 
Hemlock Water. See Cicuta. — 
Hippomane Mancinella, See Mangeneal-trem 
Hot-boufes, air of, is offenfive, p. 49. 
Honey-Juckle. See Caprifolium. 
Hungary, whyits plains are ae ER T= 
to remedy this evil, p. 2 
- Hyofeyamus yields dephlopifiiezted air by day, exp. 61.— 
"ats effets upon common air, p. 65.—Its remarkable 
quality of contaminating common air by night, exp. 
43> 44.—lIs checked by cold weather, p. 289. 
I, 
a air, what? p. liv.—Effeét of plants upon 
it, ps & feq. as9 so3—118.—Is changed by 
# even bel 
Pe 1 at produc . . 
p- 146.—Extricated from food in our "Tete, m 
118. 
Inflammatory D feafes, new method of curing them, p. xlvi, 
Inteffines, what air they contain, p. 116. 
Inundations, to be prevented, p. 291. 
Juniperus Virgineana, its dephlogificated air examired, 
exp. IT. 
+. 
‘Lake Pontine, why its air is danpercgge p. 147. 
Lamium Album, its natural air examined, p- 26. —Its 
dephlogiflicated lecerrnes exp. 3... 
5 Laurocerasus. 
