428 Scientific Intelligence, 
line precipitate insoluble in cold water and containing palladium, osmi- 
e elements of ammonia. 
When osmite of potash is added to a solution of chlorid or sulphate 
of luteocobalt, 6NHs.Co2Cls or 6NH3. Co20s. 380s, a buff-yellow pre 
cipitate is thrown down, which on addition of HCl gives a wine-yellow 
solution. This solution after a short time deposits beautiful erystalsof 
which on addition of chlorhydrie acid gives a beautifal yellow crystals 
lee 
of ammonia. The chlorid gives well crystallized salts with the chlorids 
of platinum, gold and mercury. Its solution is decomposed by gentle 
heating, osmic acid being evolved while a black powder is thrown down, — 
The other ammonia-cobalt bases give analogous compounds i 
however are decomposed almost as soon as formed. It is my intention 
if possible to examine the relations of osmite of potash to one or two 
of the arsenic and antimony bases, as for example to the chlorids having _ 
the formulas (CsHs)sAsCl and (CsHs)4SbCl. oe 
When ammonia is added to a solution of osmite of potash, therel — 
color of the latter passes immediately to wine-yellow. Fremy supposts 
that an osmiamid is formed here having the formula OsO2. HN. ‘ : 
find that the product is a new osmium ase, the chlorid of which is 
formed at once by neutralizing the yellow solution with HCl. This 
chlorid has probably the formula Hs NCl, though it may be 
Os 
poe LNCL In like manner I am still doubtful whether the true 
mula of the other ammonia-osmium base is 2NH3.Os02.0 or NHS. : 
mula 2NH3.Os02.0 improbable since we have many analogous oe, A 
as for instance-in xanthocobalt and flavocobalt, the formulas of the : 
rids of which are, you will remember, louie 
NO2. 5NH3.Co20.Cls and 2NO2.5NHs.Co20.Cl. : 
The chlorid 2NH3. OsOa. Cl or 2NHs .OsCl4-2HO is decomposel 1 
boiling with chlorhydric acid, giving sal-ammoniac and a new © 
which is perhaps identical with that just mentioned. This 18 
plained by the equation 
2NHs. OsCl+-HCI=NHs.OsCl+-NHiCl, 4 e 
and the decomposition would then be exactly analogous to that of : 
lad-diamin under the same circumstances ‘ 
a 
August last. There are still some difficulties to be overcome, but 
