F 
' ftration of this queftion to form, by Sir 
PHYSIGAL ann LITERARY. 6 
$B C TF. VIL 
Querics, confifting of Doubts, : Difficulties, and 
Conjectures, concerning Light Colours, and 
| coloured Bodies. 
Query I. Are not the rays, emitted by 
all forts of luminous bodies, fimilar to 
thofe of the fiin, both as to colour and 
degrees of réfrangibility? And, do not lu-. 
minous bodies differ from one another 
only according to the colours which they 
émit moft plentifully, in like manner as 
opaque bodies are diftinguifhed by the 
colours of incident light which they re- 
fle in greateft abundance? (See N° 24. 
25. 26.27.28. and 29.) But, to make 
our induction fufficiently ftrong,; ought 
‘hot experiments to be made with the 
_ lights of a greater variety of bodies? And 
would it not further conduce to the illu- 
Vou. IL I Haac’s 
