[ 285 |] 
I filled a jar with, common: air, 
and put one meafure of-it, with one 
of nitrous air. freflly amade, in five 
veffels, each,of a different, diame- 
ter, to,incorporate. with; each-other 
without. moving them: after-an 
hour’s.time, 1 let up the airs ofthe 
different jars, into the large tube or 
meafure, when J found, that,;the co= 
lumn,of, air. occupied foimuch the 
als “pace a as. 3 ths; vetlel i in which 
bat aS es hee — awere ¢ 
nifhed. near-fo. reat a Asi 5 they ev were 
when, fhook, immediately - together. 
in the, way: above-mentioned, — It 
is very, remarkable; that,1. could 
{carcely reduce-any of thefeaimmat- 
terwards toa lef bulk, though I 
fhook - them)-very -forciblyein e the 
large tube afterd. hadcexamined 
—— “sthem, 
i275. The 
