OBSERVATIONS. 
ing heat. I found at the bottom of the 
crucible an uniformly melted regulus of 
tin, the weight of which was 26 grains, 
and I collected, by walhing the powdered 
charcoal, 11 grains more in fmall glo¬ 
bules, and half a grain of black flocculi 
very attractable by the magnet. The 
inner furface of the cover was fprinkled 
with fmall globular particles of tin, which 
could not be collected, but which I 
thought equivalent to 1 grain. 
The reduction by phlogifton alone is 
therefore the belt, and proves wood-tin 
to be one of the richeft tin-ores, for there 
are very few other tin-ores, which allay¬ 
ed give 637 in 100. 
§ 3 * 
This tin feemed to be neverthelefs 
fomewhat more brittle and hard than pure 
tin. When diffolved in marine acid a re- 
fiduum was left of blackilh, Ihining fcales, 
three- 
