179 Gelatine. 
+ Inife, than it exploded with its usual violence ; the table was 
_ splitin two; blood issued copiously from every part of his face, 
not from wounds, for it does not appear that the fragments hit 
him, but, according to the opinion of a competent judge, the blood 
was actually forced through the pores of the skin by the power 
of the explosion, which very nearly destroyed his eyes. He 
suffered immensely, but now, at the end of eight months, sees 
partially with one eye, but the other is nearly, if not quite de- 
stroyed. 
Should not the tampering with such dangerous substances, 
by ignorant people, be prevented by law ? 
In a late lecture in the laboratory of Yale College, some 
fulminating silver, on the point of a knife, was in the act of be- 
ing put upon a copper-plate connected with one pole of a gal- 
vanic battery in active operation, the other pole was not touched 
by the experimenter; but it seems that the influence which 
was communicated through the floor of the room, was sufficient 
instantly to explode the powder, as soon as the knife touched 
the copper-plate; the knife:blade’ was broken in two, and one 
‘half of it thrown toa distance among the audience. 
Recently, also, we are informed in one of the foreign jour- 
nals, that a man in England, who accidentally trod on a quanti- 
ty of fulminating silver, had his foot nearly destroyed by the 
explosion. 
} : 
USEFUL ARTS. 
, OG BH 
Arr. XTX. Account of an economical method of obtaining 
Gelatine from Bones, as practised in Paris. ; 
cated to the Editor by Mr. Isaae Doolittle. 
P : 16th May; 1818: 
My Dear Sir, Bg 
FEW days since I visited the very interesting establish 
ment of M. Robert, for the extraction of the gelatinous matte! 
from bones. 
