112 On the Oxi-hydrogen Blow-pipe. 
Vesuvian—instantly melted into,a beautiful green glass. “It 
melts before the blow-pipe into a yellowish glass.”— (Ibid. 534.) 
Leucite—instantly fused into a perfectly transparent white 
glass: the fusion was attended with strong ebullition, and many 
ignited globules darted from it and burnt in the air, or rolled out 
upon the charcoal and then burned, Were they not potassium ? 
This stone contains full 20 per cent. of potash:—'This hint will 
be resumed below. | 
“It is not fused before the blow-pipe.’’— (Murray, ili. 534.) 
Chrysoleryl—(Cymophane of Haiiy) was immediately fused 
into a grayish-white globule. ‘It is not melted by the blow- 
pipe.” — (Ibid. 499.) 
A crystallized Mineral.—From Haddam, Connecticut; ac- 
cording to the Abbe Haiiy, it is chrysoberyl; according to Co- 
lonel Gibbs, corundum: it fused with ebullition and scintilla- 
tions, and produced a very dark globule almost black. 
Topaz—of Saxony, melted with strong ebullition, and became 
awhite enamel. ‘It is infusible before the blow-pipe, but 
melts when borax is added.”’—(Ibid. 498.) 
Sappar or Kyanite—perfectly and instantly fused, with ebul- 
lition, into a white enamel. ‘ It remains perfectly unaltered 
before the flame of the blow-pipe even when excited by oxygen 
gas.’ —(Ibid. 499.) . 
Corundum—of the East Indies, was immediately and perfectly 
fused into a gray globule. 
Corundum—of China, the same with active ebullition. Corun- 
dum “ is not fused by the flame of the blow-pipe on charcoal 
even when soda or borax is added to it.”—(Ibid. 495.) 
Zircon—of Ceylon, melted with ebullition into a white enamel. 
“ Jt is not melted alone before the flame of the blow-pipe, but 
if borax is added it forms a transparent glass.’”’— (Murray, iii. 
539.) 
Hyacinth—of Expailly, fused into a white enamel. “ It 
loses its colour before the flame of the blow-pipe, but it is not 
fused; it melts with borax into a transparent glass.’’— (Ibid. 
540.) 
Cinnamon stone—instantly fused into a black globule with 
violent ebullition. 
Spinelle Ruby—fused immediately into an elliptical red glo- 
bule. ‘It does not melt before the blow-pipe, but is fused by 
the aid of borax.”— (Ibid. 497.) 
Steatite—melted with strong ebullition into a grayish slag.— 
« It does not melt before the blow-pipe, but becomes white and 
very hard,” — (Ibid. 482.) 
Porcelain, common pottery, fragments of Hessian crucibles, 
Wedgwood’s ware, various natural clays, as pipe and posi 
clay, 
