10 (5 On the Preparation of Amber Varnish, 
purple. When the degree which is best suited to purple 
lias been found, the other less fusible colours may be so 
regulated, (by additions of flux,) when it is necessary to 
fuse all the colours at the same time, and at the same de- 
gree of heat. 
You may paint also in enamel without flux ; but all the 
colours do not equally stand the heat which must be em- 
ployed. If the enamel, however, on which you paint be 
very fusible, they may all penetrate it. This manner of 
painting gives no thickness of colour ; on the contrary, the 
colours sink into the enamel at the places where the tints 
are strongest. To make them penetrate, 'and give them 
lustre, a pretty strong fire will be necessary to soften the 
enamel and bring it to a state of fusion. This method 
cannot be practised but on enamel composed with sand, 
which I call enamel sand, as already mentioned. It may 
be readily seen, also, that the colours and enamel capable 
of enduring the greatest heat, will be the most solid, and 
the least liable to be changed by the air. An account of 
the method of employing and baking enamel may be found 
in various works, and may be learned also by seeing the 
operations of enamellers. 
NO. 80. 
On the Preparation of Amber Varnish , and the Appli. 
cation of it to different Kinds of stained Wood . By 
Nils Nystrom.* 
AS furniture of foreign wood is in general expensive, 
the use of the indigenous kinds of wood ought not to be 
neglected, especially when they are of a compact texture, 
* Tilloch, voL 7, p. 232 . From the Transactions of the Academy of Sciences 
at Stockholm for the year 1797 . 
