[ 3 6 3 3 
m In feme' of the pieces which he was fo obliging 
In tome or p , s lie M intermixed and 
as to fend m , - j 0 bferve them to be dif- 
saw* - 'snfi", :r.”t 
COl He r ' has lately informed me, that, fmce he fent 
me this Piece he has (truck thefc pnfmat.c colours 
me tnis picn., n.:ii ore vlV id and. 
into another mafs of glaC , m a one an _ 
a fecond explofion, without moving any 
Pa Xftpgw!t d Which 
thicknefs of them varying regularly, as they 
f T ‘the mWdk ofthefe coloured fpots .Joui |N ‘ ’*■) 
?*zx%£r* 
fappofe by the ^ fcraped away, 
whe e n°the a furface of the glafsis left without its pohlh 
(a The N piece of glafs on which I have marked thefe 
, J’bU as welf as that on which he has fttuc the 
A a a 2 U 
