Anatyfis of the Air. t 8 9 
Experiment LXXVII. 
To prevent which I made ufe of the fol- 
lowing method of diftillation* which is 
much more commodious than with Glafs 
Retorts , whofe juncture at a (Fig. 33.) it is 
not eafy to fecure. Having firft: put the 
matter to be diftilled into the iron retort 
rr (Fig. 3$.) which was made of a musket 
barrel* I then fixed a leaden fyphon to the 
nofe of the retort* and having immerfed 
the fyphon in the veffel of water xx, I 
placed over the open end of the fyphon the 
inverted chymical receiver a h which was 
full of water 3 fo that as the air which was 
I raifed in diftillation* pafled thro* the water 
up to the top of the receiver ab, a good 
part of the acid fpirit and fulphureous fumes 
were by this means intercepted and retain- 
ed in the water; the confequence of which 
I was* that the new generated air continued 
in a more permanently elaftiek ftate* very 
little of it iofing its clafticity, viz. not a- 
bovc a 15th or 18th part* and that chiefly 
the firft 24 hours * after which the remain- 
der continued in a conftantly elaftiek ftate * 
excepting the airs of tartar and calculus hu- 
mmus > which in 6 or 8 days loft conftantly 
above one third of their elafticity 5 after 
~ ~ which 
