72 FS. Pfeil and H. Leffman on the Ammonium Amaigam. 
pustulose scale, measuring about ten inches by fourteen; the 
pustules are about one-fourth of an inch in diameter. Consider- 
able digging was done, but no further discoveries made. 
Being | absent from home, I have not the opportunity of ref ‘ 
ring to my specimens, and I cannot thotetors make the present 
notice more complete. 
Panama, U. 8. C., May 11, 1866. 
ArT. X.—On the Ammonium a by F. S. Pret’ 
and Henry LEFFMA) 
For some years the attention of chemists nae been directed 
to the eareeeey oe of the substitution ammoniums. Notwith- 
standing their close analogy to ammonium itself, in many re 
spects, we ston not been able to find record of any systematic 
attempt to form amalgams analogous to the well known ammo- 
site amalgam. The consideration of this fact induced us to 
mence a series of experiments . determine the deportment 
of ee bodies with sodium amalga 
A saturated solution of chlorid “of trimethyl-ammonium was 
treated with sodium amalgam, and a series of phenomena fol- 
lowed éxactly identical with those which occur in the prepara- 
tion of the ammonium amalgam. The swelling rapidly subsided, 
hydrogen gas a given off, and the liquid was found to con- 
tain trim ethylam 
Saturated sit pS of the chlorohydrates of aniline, conine, 
morphine and quinine, and of the acetate of rosaniline, when 
treated with sodium amalgam, give rise to copious evolution of 
ao gas, apse turgescence. 
ts (in addition to ote ee by Dr. ©. 
0s 
are, pe ee peipieeneeres, either liquid or solid, produce 
no amalgam. 
ae — be mentioned that a solution of chlorid of ammonium 
in pure glycerine gives rise. to an amalgam, but the turgescence 
is much interfered with by the viscosity of the solvent; and also 
that sodium amalgam, when placed upon a crystal of chlorid of 4 
ammonium, produced no -Teaction until moistened with a drop 
of water. 
? The address of F. S, Pieil is 1437 North 11th street, Philadelphia. 
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