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1 An Account of .MK James Chriltopher Le Blon’* 
< Principles of Printing, in Imitation of Paint- 
ing, and of Weaving Tapeftry, in the fame 
manner as Brocades. By Cromwell Morti- 
mer, M. 2X 5. % Secret . 
M R. Le Blon endeavouring to fix the true Har- 
mony of Colouring in Painting, found that all 
vifible Objects may be reprefented by the three pri- 
mitive Colours, Red, Tellow, and Blue ; for out of 
them, all others, even Black itfelf, may be compound- 
ed. We are beholden .to the great Sir Ifaac Newton 
for the Difcovery of the Difference of Colours con- 
tained in the Rays of the Sun-, and that the Union 
of them all produces a White, which is Light itfelf. 
For Diftindtion fake Mr. Le Blon calls thofe Co- 
lours which are comprehended in the Rays of the 
Sun, Impalpable Colours , and thofe ufed in Painting, 
Material Colours. In the material Colours, a Mix- 
ture of all Three produces a Black or Darknefs, con- 
trary to what is obferved in the Impalpable , which I 
faid juft now produce White. Mr. Le Blon takes this 
Phaenomenon to be owing to the Body or Subftance 
of which thefe three material Colours confift, and 
to the Particles of them being Opake , and not Tranf 
parent ; “for they only refleft certain Rays of Light, 
that ftrike on their Surfaces ; and therefore when 
'final! Particles of different Colours are placed clofe to- 
gether, if they are fo fmall that each of them cannot 
be feen feparately by the Eye, we do not difcern the 
0 Colour 
