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Internally it appeared of a clofe and fmooth, though 
uneven furface ; and of a dark-grey colour. By the 
file, or a knife, it was readily fcraped into a blackifh 
duft. 
2. One part of platina and two of tin, covered with 
black flux, borax and common lalt, were melted in 
a wind furnace : The platina appeared perfectly taken 
up by the tin, l'ocn after the fire had been raifed to 
a light white heat. The ingot was found deficient 
in weight about one-ninetieth. It greatly refembled 
the foregoing, being only a little lefs brittle, and of a 
fomewhat lighter colour. 
3. One ounce of platina and four of tin, covered 
with black flux and common fait, and urged with a 
quick fire, melted together without lofs. This com- 
pound yielded a little to gentle flrokes of a flat ham- 
mer, but was by no means tough. It broke in pieces 
from a rude blow, and was fiiil readily fcraped into 
Juft by a knife. The furface of the fradture was 
rough and granulated. 
4. One part of platina and eight of tin, injected 
into a fluid mixture of black flux and common fait, 
united, without lofs, into a pretty tough compound ; 
which bore to be considerably flattened under the 
hammer without breaking, cut fmooth with a thin 
chiflel, and Shaved with a knife. Broken, it appeared 
of a Sparkling, dark-coloured, coarfe-grained texture. 
y. One fart of platina and twelve of tin, treated 
in the fame manner, formed a mixture tolerably duc- 
tile ; but ftill of a dull, dark hue, and a rough coarfe 
grain, though fomewhat lefs fo than the preceding. 
6. A mixture of one part of platina and twenty- 
fur of tin, proved not much differ than tin. The 
colour 
