[ 67° ] 
thin into a long mould, without lofs. The metal 
was of a white colour, hard to the file, broke from 
a rude blow, but when well nealed, yielded confi- 
derably to the hammer. 
2. One part of platina and four of gold came in- 
to fufion in a moderate fire, but ffcill required a very 
ftrong one for their perfed: union. This compound 
appeared but a little paler than ftandard gold with 
filver alloy ; and proved fo tough, as to be beat, with 
proper care, into thin plates, without breaking or 
cracking about the edges. On melting it a fecond 
time with nitre and borax, it became very pale, and 
was not without great difficulty made to recover its 
colour. 
Article y. 
Platina with Copper. 
1. Equal parts of platina and copper, expofed, 
without addition, to a flrong fire haftily excited by 
bellows, foon became fluid, but not thin ; and loft 
about one-fixty-fourth. The metal proved extremely 
hard to the file ; broke difficultly on the anvil ; flew 
afunder on endeavouring to cut it with a chiflel j and 
appeared internally of a coarfe-grained texture and 
white colour. 
2. One ounce of platina and two of copper, urged 
with a quick fire in a blafl: furnace, without addition, 
flowed fufficiently thin, and fcarce buffered any fen- 
fible lofs. The metal was fiill very hard, and yielded 
but little to the hammer. It looked darker coloured 
than the foregoing, with a flight reddifh call:. 
3. One ounce of platina and four of copper, treat- 
ed in the fame manner, united, without lofs, into a 
pretty 
