I  Mercurammonium  Chlorides.  {^"^■Feb^'ifss*^"^* 
The  analyses  of  the  specimens  may  be  tabulated  as  follows  : 
HgS. 
NH4CI 
la. 
92.20 
21.20  1 
b. 
92.05 
21.60  J 
f-  NHgHgCl. 
26.02%  NH^HgCl. 
II  a. 
80.30 
31.50 
73.98%  (NH3CI),  Hg. 
b. 
83.80 
29.20 
1  47.65%  NH^HgCl. 
c. 
83.80 
29.00 
(52.45%  (NHgClj^Hg. 
19.84%  NH^HgCl. 
d. 
79.30 
32.00 
80.16%  (NHsCl)^  Hg. 
48.88  %  NH^HgCl. 
e. 
84.00 
51.12%  (iNHoCl)o  Hp-. 
Ill  a. 
99.40 
b. 
99.60 
11.00  J 
^NHg^ClH^O. 
IV  a. 
100.30 
12.00  1 
Mixtures  of 
b. 
J  02.20 
12.20 
^NHg^ClH^O  and^^Hg2< 
c. 
102.40 
The  results  of  the  experiments  may  be  summed  up  as  follows : 
Mercurammonium  chloride  is  produced  by  the  addition  of  ammonium 
hydrate  in  excess  to  a  solution  of  mercuric  chloride,  as  well  as  by  the 
U.  S.  P.  process.  If  the  ammonium  hydrate  be  added  to  a  boiling 
solution  of  mercuric  chloride,  the  above  compound  will  separate  as  a 
granular  quickly  subsiding  powder,  easier  Avashed  than  the  U.  S.  P. 
product.  Mercurdiammonium  chloride  is  not  gotten  pure  by  the 
method  asserted  to  yield  it,  that  is  by  the  precipitation  of  the  solution 
containing  the  chlorides  of  mercury  and  ammonium  with  sodium  car- 
bonate. What  is  gotten  is  either  a  mixture  of  mercurammonium  with 
mercurdiammonium  chloride,  or  else  a  double  salt  of  mercurammonium 
chloride  and  ammonium  chloride,  of  varying  composition  The  pro- 
duct nearest  approaching  in  composition  that  of  mercurdiammonium 
chloride  was  gotten  by  using  a  boiling  solution  of  the  chlorides,  and 
adding  the  sodium  carbonate,  allowing  to  stand  until  effervescence  ceased, 
and  filtering  and  washing. 
Supposing  these  products  to  be  a  mixture  of  NH2HgCl  and 
(NH3C1)2  Hg,  the  percentage  of  the  former  can  be  gotten  by  subtract- 
ing from  the  percentage  of  mercuric  sulphide,  yielded  by  the  sample, 
76.09,  and  dividing  the  remainder  by  0.1618. 
Tests  to  show  presence  of  mercurdiammonium  chloride  or  ammo- 
