64 PROCESS FOR MAKING AMBER VARNISH. 
This vessel is introduced into a large chafing-dish fixed upon 
a high stand, and its tapering bottom projects through a 
hole in the bottom of the chafing-dish, and extends a few 
inches downwards. When the vessel is thus adjusted, the 
chafing-dish is nearly filled with coal, and lighted. The fuel 
is, by the peculiar form of the chafing-dish, prevented from 
dropping into the oil vessel, to be presently described, and 
thereby soiling the liquid. 
The heat from the ignited fuel very soon heats the vessel 
to such a temperature as will melt the amber and cause it 
to flow through the perforated metal or sieve above men- 
tioned, in passing through which it will be purified from all 
extraneous matters. The melted amber runs into a copper 
vessel which is placed below the chafing-dish, and is pro- 
vided with a long handle. This vessel or receiver is filled 
about two-thirds full with the oil from which it is intended 
to prepare the varnish, and is placed upon an ordinary 
chafing-dish charged with incandescent fuel, which heats 
the amber to such a temperature as to cause it to become 
incorporated with the oil. When this is completely 
effected, the vessel is cleansed for a fresh operation, and the 
other ingredients necessary for the manufacture of the var- 
nish are added to the mixture of oil and amber, as soon as 
it has cooled down to a suitable temperature. 
These very simple means present the following important 
advantages over those now in use for the manufacture of 
varnishes: 
1st. The amber meltscompletely without any residuum; 
and as it is contained in a perfectly tight vessel, nothing, 
or next to nothing, is lost by the evaporation of its consti- 
tuent parts. 
2d. The application of a high temperature effects the 
fusion with ease and rapidity. 
3d. This mode of preparing varnishes is perfectly free 
from danger as regards fire. The amber is contained in a 
perfectly close vessel, and cannot, therefore, take fire, espe- 
