INDEX. 



Artmljia Pontica, its air examined, exp. 14. 



Artichoke, air yielded by their leaves in the night ex a* 

 mined, exp. 37. 



Afthmatics, what climate beft fer them, p. 143. 



Atmofphere, its degree of falubrity is very variable, p. 

 107 and feq. At what time of the year the pureftv 

 p. 141. — The exacT: degree of its falubrity can be ex- 

 amined, p. 107 and feq. 125. — How to examine it, 

 p. 97, 10S. 276. — Erroneous judgement of fome about 

 its degree of falubrity in a given place, p. 126.— The 

 caufe of its variability examined, p. 126. 



Atriplex vufoaria yields dephlogifticated air by day, exp. 

 64. 



Autumn, the difpofition of the air in autumn, p. 142. 



Autumnal cold checks the mifchievous influence of vege- 

 tables by night, p. 288. — But not of the flowers, p. 

 289. — Does not interrupt the beneficial influence of 

 vegetables by day, ibid. 



B. 



Beans. The leaves of this plant yield by day dephlogifti- 

 cated air, exp. 7, and phlogifticated air by night, 

 exp. 38. — Their faculty of mending bad air by day- 

 time, exp. 41. and of contaminating good air by night, 

 exp. 40. — The Beam themfelves yield in the fun an 

 air worfe than common air, p. 60. — Their remarkable 

 faculty of poifoning common air by night, and in the 

 fhade, p. 61. exp. 87 — 90. Their deleterious effect 

 is checked by the fun-fhine, exp. 87. 



Becahunga, its dephlogifticated air examined, exp. 5.— 

 The air of the roots examined, exp. 74. 



Berries t 



