Chlorids corresponding to Peroryds. 107 
5. Bromo-thallic and Iodo-thallic acids—After having established the 
fact that thallium forms with bromine and iodine t @ compounds T! Br’, 
rm 
with the bromids and alkaline iodids, bromo-thallates and iodo-thallates, 
perfectly definite and crystallizable (Feb. 1864). These compounds are 
isomorphous with one another. Fu rther, the acids Tl Cl? and Tl Br? are 
capable of cugtecna with several equivale ents of ether. TII? however 
does not so combine under these ‘22° amen it has not yet been 
isolated.— Comptes Rendus, March, 1 
6. Separation of lead and of sis by means of Bromo-thallates.— 
There has been till now no process known by which lead can be easily 
m 
and free from chlorids or from brom aide in exes ss, they do not act upon 
the salts of lead, while they yield with the salts of ll a rakes pre- 
cipitate of bromo-thallate of bismuth. This white precipitate is soluble 
in a concentrated solution of sal-ammoniac. The reagent employed is 
one of the salts which I have described. 
Br Tl, Bre K+-4HO; rhombic tables. 
Br? Tl, Br Am-+-8HO; crystallized in yellow needles. 
Br? Tl, Bre Am+4HO, isomorphous with the first, 
Having a limpid solution containing a salt of lead, as well as one of the 
bromo-thallates of which we have been speaking, it is sufficient to sees some 
nitrate of bismuth to obtain immediately a marked reaction ; all is- 
muth is ‘Stk in the ee when a sufficient quantity of the heeds 
thallate has been e employed,—Journal de Pharm. et de “i [hh ii, 218. 
0 detonating Antimony.—This metal, as Mr. Gore has observed, 
attaches itself to the negative pole of a pile, whien a solution of po elie 
rid, bromid or iodid is s ubjected to voltaic action. Various explanations 
lave been given of this oe and it is not surprising that it has 
been attributed to catalysis, or to a uliar condition of the iene 
in 1858, j is in no ian contrary to rate for chlorid of ad 
We may then ex ect to see formed an explosive phosphoru 8, arsenic, 
o smut, be because of the wena itunes these elements and nitro- 
or anti 
Existence ce of chlorids corresponding to peroryds,—In treating 4 
+ allan manganese with hydrochloric acid, free chlorine is 0 
accordance with the equation Mn0?-}-2CIH= 2HO+Mn Cl-+-Cl (1 si 
The treatises add that half the chlorine is set free because ct, com- 
Pound ding to MnO2, that is to say t es ites ane oe 
ae mapa apes if so the equation = 
