Aualyft. 



<3 





artifice the air which I expired muft ncccf- 

 farily pafs thro' all the 'Diaphragms, before 

 it could be infpircd into my lungs again. 

 The whole capacity of the bladders and fy- 

 phon was 4 or 5 quarts. 



Common Tea fait, and Sal Tartar, being 

 ftrong imbibers of fulphureous (learns, I dip- 

 ped the four Diaphragms in ftrong folu- 

 tions of thofe (alts, as aifo in white wine 

 vinegar, which is looked upon as a good 

 anti-pcftilential : Taking care after each of 

 thefe Experiments to cleanfe the fyphon 

 and bladder well from the foul air, by fil- 

 ling them with water. 



I could breath too and fro the air inclofcd 

 in this inftrument for a minute and half, 

 when there were no Diaphragms in it j when 

 the 4 Diaphragms were dipped in vinegar, 

 3 minutes ; when dipped in a ftrong folution 

 of fca fait, 3 minutes and an half. In a Lixi- 

 vium of Sal Tartar, 3 minutes? when the 

 Diaphragms were dipped in the like Lixi- 

 vium, and then well dryed, 5 minutes; and 

 once 8 4- 4- minutes, with very highly cal- 

 cined Sal Tartar ■> but whether this was ow- 

 ing to the Tartar's being greatly calcined, 

 whereby it might more ftrongly attrad ful- 



S 4 phureous 













