252 Scientific Intelligence. 
the formulas of the various compounds with a general account of 
The 
their properties. formulas of the salts ar oer by Cléve 
belonging to the tetramin series are as follow 
Chlorid, Gr, Oh, .NH,, 2HO, 
Chlorplatinate, Cr,Cl,, 4NH,, 2HO+2PtCl,. 
Chlorhydrargyrate, Cr,Cl,, 4NH,, 2HO+6HgCl. 
Chlorobromid, Cr, ClBr,, 4NH,, 2HO 
Bromid, Cr,Br,, 4NH,, 2HO. 
Bromochlorid, Cr, BrCl,, 4NH,, 2HO. 
Chloro-iodid, Cr,Cll,, 4NH,, 2HO. 
Todid, Cr,I,, 4NH,, 2HO. 
Chlorosulphate, Cr,ClO,, 4NH,2S0,, 2HO. 
Bromosulphate, Cr, BrO,, 4NH, 280,, ; 2HO, 
Chlorochromate, Cr,Cl0,, 4NH,2Cr0,, «HO. 
Chloronitrate, Cr,ClO,, 4NH,, 2N05, 2HO. 
All these salts are crystalline and easily soluble in water. They 
ve a carmine or garnet red color and their solutions are 
ea ecomposed on heating, with separation of chromic oxyd 
and evolution of ammonia e author calls attention to the very 
~onbehetwe fact that they all contain 2 atoms of water (in the old 
notati 
the svoond series of compounds described are the salts of hepta- 
min-dichro 
: pes formulas of the only observed members of this series are a8 
0. 
Double nitrate, 2(Cr,0,, 3NO,), 7NH,-+NH,0, NO,-+-9HO. 
Oxalo-nitrate, 2(Cr,©,, NO,, (C,0,),), 7NH _-+6HO. 
The salts of the ey series are as ge 
Oxalate, Cr,0;, 30,0,, 3NH,, 3H 
Double oxalate, 2(Cr,0,, 3C 49,; ee O, 20,03, 
HO+3HO. 
The salts of the heptamin and ‘triamin series resemble those 
of ——- ae min series so closely as not to require special descrip- 
Cr,0,, NO,, a dle 
Cr,0,, C,0,, NH, +8HO. 
2(C,0,), SO,, oN 3 +2410. 
a5 me however, very doubtful whether these three substances were 
