o 
O B S ERVATIONS. 37 
diffufed through the borax glafs. Upon 
the remaining precipitate marine acid 
was poured, which Toon diffolved it ; 
from this folution, after having been di¬ 
luted with water, tin leaves were depo- 
lited upon a cylinder of zinc. 
(cJin order to know, if wood-tin could 
be made to diffolve more eafily in acids 
by melting it firft with alkali, one dram 
of it was melted with three drams of 
- fixed vegetable alkali, and the light 
brick-coloured mafs, which was produced 
walhed in water, and the folution filtred. 
The ley which pafled clear through the 
filtre was not changed in its appearance 
by acidsj and the edulcorated and dri¬ 
ed powder, which was lefs coherent, and 
of a redder colour, was not more foluble 
than before. 
fdj One dram of pulverized wood-tin 
was mixed with three drams of fal ammo¬ 
niac and fublirned in a fmall matrafs. 
The fublimate was of a greyifh yellow 
colour. The refiduum was again fublirned 
D 3 with 
