PHYSICAL ann LITERARY. 35 
ly mixed with them during the burning, 
different changes enfue. 
25. WHEN fal ammon. potath, or alum 
are infufed, the colour of red bodies ap- 
pears fomewhat faded and dirty: Green 
and blue appear much the fame as in can- 
dle-light ; both being faint and hardly 
diftinguifhable: White and yellow are 
{carcely at all affected. 
26, WHEN nitre or fea-fale are plenti- 
fully mixed with the burning fpirits, and 
the whole is ftirred about brifkly ; the 
brighteft red bodies, feen by the light 
_ then emitted, are reduced to a dirty tawny 
brown, that feems to have nothing of red- 
nefs init: Green is transformed into ano- 
ther fort of brown, only diftinguifhable 
from the former by a certain inclination 
to a livid olive-colour ; when nitre is mix- 
ed with the fpirits, one may full fee fome 
remains of a greenifh colour, unlefs it be 
_ poured iv very plentifully: Dark blue is 
hardly to be known from black, except 
_ that it appears the deeper black of the two: 
- Light blue is changed into a very light 
_ brown of a peculiar kind: White aflumes. 
a 
