The CONTENTS. 
Jfs crooked Flapes not owing to the following a 
^rainof fulphureous Vapour s, n. 15, 
Hurricanes^ bcc, whence^ n. 13, 
Experiment IV. p. 292. 
Efervefcent Mixtures both generate and abforb 
Air at the fame time. 
Experiment V. p. 295. 
An Account of fever al efervefcent Mixtures in 
Vacuo y n. i, &c. 
^he Heat of efervefcent Mixtures from intefine 
Motion^ notFirOy n. 90. 
Hew generated Air is permanent and equally 
comprefible with common Air^ n. 93. 
^he noxioufnefs of fadiitious Airs no Argu* 
ment that they are not permanently elaficy 
n. 94. 
7 he Reafon why lefs elafiic Air is generated 
from efervefcent Mixtures in VacuOy than in 
the Airy n. 95. 
Experiment VLp. 323. 
How long we can breathe to and fro a ^antify 
of the fame Airy n. i, &c. 
^he noxious Air of Goals to be ventilatedy n. 3, 
Vinegar ufed to cure noxious Air^ n. 4. 
