[ 45 ] 
fpatula might make them unite.) This fucceeded fo 
well, as to reduce the furface to a tolerable degree of 
fmoothnefs : but as the ground was broke off in 
many places, I repaired it with flake white, mixed up 
with the yolk of an egg and milk, and repainted it 
with moloffes fpirit (inflead of water) ; and then put 
it into an oven with a moderate degree of heat. In 
this I found the colours fixed,, but darker than when 
it was firft painted ; and it would bear being walked 
with water, not rubbed with a wet cloth. 
Experiment V. 
A board (that had been ufed in a former experi- 
ment) was fmeared with wax and refin, of each 
equal parts ; was wetted with moloffes fpirit, to make 
whitening (or Spanifh white) mixed with gum-water 
adhere. This, when dry, was feraped with a knife, 
to make it equally thick in all places. It was put into 
a warm oven, to make the varnifh incorporate partly 
with the whitening before it was painted ; and it had 
only a fmall degree of heat : water only was ufed 
to mix the colours. This was again put into an 
oven with a greater degree of heat j but it flaked off 
from the board : whether it might be owing to the 
board’s having had a fecond coat of varnifh (the 
firff having been feraped and melted off), and that 
the undtuous parts of the wax had fo entered its 
pores, that it would not retain a fecond varnifh, I 
cannot tell. 
Experiment VI. 
Having mifearried in thefe trials, I took a new 
board, planed fmooth, but not polifhed, either with 
afifh- 
