352 Miscellany. 
tity of mercury is poured into the cone to fill the pouch ; this which is 
now a solid ball, is plunged for a short time into a concentrated solution 
of sweetened gelatine, and then placed in a heated stove in a vertical po- 
sition. 
The first layer being- dry, another is to be applied in the same manner, 
then a third &c. After a sufficient thickness has been attained, the cone 
is reversed, the mercury flows out of the pouch, and this becoming col- 
lapsed, permits the removal of the capsule. Into this can now be intro- 
duced any medicine that will not dissolve the gelatine, in doing this, care 
must be taken to preserve the exterior of the capsule from any contact with 
the contained substance. 
To close the opening, a thin lamina of gelatine cut in a circular form is 
to be placed on it ; having previously softened this cover by means of 
steam, to render it perfectly adherent, a solution of gelatine is to be ap- 
plied to the edges with a camel's hair brush. If kept in a dry place, cap- 
sules thus prepared will keep for a long time. 
Cotter -eau. Traite de Pharmacologies 
Nitro-sulphate of ammonia. — M. Magendie states that he has used this 
preparation with the following results : 6 grains dissolved in water in- 
jected into the veins of dogs, caused only a temporary affection of the brain. 
In doses of 12 grs. administered in the usual way, it produced no appar- 
ent result. 
Whether by a fortuitous concurrence of circumstances, or from the pecu- 
liar action of this remedy, all the patients in the Hotel Dieu affected with 
typhoid fevers, to whom it was administered in doses of 12 grs. dissolved 
in water, speedily recovered. The total quantity taken by each was about 
one drachm. Journ. de Pharm* 
