Analyfts of the Air. 16$ 



artifice the air which I expired muft necef- 

 farily pafs thro' all the 'Diaphragms, before 

 it could be infpired into my lungs again. 

 The whole capacity of the bladders and fy- 

 phon was 4 or 5 quarts. 



Common fea fait, and Sal Tartar, being 

 flrong imbibers of fulphureous fleams, I dip- 

 ped the four 'Diaphragms in ftrong folu- 

 tions of thofe falts, as alfo in white wine 

 vinegar, which is looked upon as a good 

 anti-peftilential : 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\oo and fro the air inclofcd 

 in this inftrument for a minute and half, 

 when there wore no Diaphragms in kj when 

 the 4 Diaphragms were dipped in vinegar, 

 3 minutes; wher^dipped in a flrong folution 

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

 vium of Sal Tartar, 3 minutes 3 when the 

 Diaphragms were dipped in the like Lixi- 

 vium, and then well dry ed, 5 minutes; and 

 onc ( e 8 -{- ~ minutes, with very highly cal- 

 cined Sal Tartar ; but whether this was ow- 

 ing to the Tartars being greatly calcined, 

 whereby it might more ftrongly attraft fuL- 



S 4 phureous 



