= _ ees a 
see aes 
PHYSICAL anno LITERARY, 37 
ther, and red more faint than the green 
. 
‘and blue. 
28. In the light of fpirits mixed with 
nitre or fea-falt, I could {till obferve fome - 
blue, tho’ exceflively weak and diluted: 
With the latter, the green was equally 
faint; but, with the former, pretty co- 
pious. But, when either of thefe falts 
were ufed, I could hardly fee any veftige 
of the red at all, at leaft when they were 
poured i plentifully, and the {pirits con- 
ftantly agitated. At every little intermif- 
fion indeed the red rays would fhow them- 
felves very manifeftly below the hole, and 
red bodies feen by that light refumed 
fomewhat of their ordinary colour: And 
it was very entertaining to obferve how 
both would evanifh again at once, as foon 
as the falting and ftirring were renewed. 
THE proportion in which the bright 
yellow exceeds the other colours in this 
light, is ftill more extraordinary than in 
the former: Infomuch that the hole feen 
through the prifm appears uniformly of 
this yellow, and as diftin@ly terminated 
as thro’a plain glafs ; except that there is 
adjoining 
