C 42 ] 
Thirdly, When the picture is dry, it is put near 
the fire, whereby the wax melts, and abforbs all 
the colours. 
Experiment I. 
A piece of oak board was rubbed over with bees- 
wax, firft again ft the grain of the wood, and then with 
the grain, to fill up all the pores that remained after 
it had been planed, and afterwards was rubbed over 
with as much dry Spanifh white, as could be made 
to ftick on it; this, on being painted (the colours 
mixed with water only), fo clogged the pencil, and 
mixed fo unequally with the ground, that it was im- 
poftible to make even an outline, but what was fo 
much thicker in one part than another, that it would 
not bear fo much as the name of painting ; neither 
had it any appearance of a picture : However to 
purfue the experiment, this was put at a diftance 
from the fire, on the hearth, and the wax melted by 
flow degrees ; but the Spanifh white (tho’ laid as 
fmooth as fo foft a body would admit, before the 
colour was laid on) yet on melting the wax into it, 
was not fufficienf to hide the grain of the wood, nor 
fhew the colours by a proper whitenefs of the ground, 
the wax in rubbing on the board, was unavoidably 
only white that had the name of Spanifh annexed to it, that I 
could procure, tho’ I enquired for it at moft if not all the colour 
(hops in town. 
My friend Mr. Dacofla fhewed me a piece of Spanifh chalk in 
his colle&ion, which feemed more like a cimolia (tobacco pipe 
clay), and was the reafon of my ufing that in one of the experi- 
ments. 
7 
thicker 
