480 
SECOND REPORT 
chlorine and oxygen salts; Wohler, the obscure compounds of 
cyanogen and its acids ; Berthier, the compounds which oxides, 
acids, and neutral salts form with each other by fusion; Se- 
rullas, the saline compounds of iodine, chlorine, bromine, and 
their acids ; Liebig, and more lately Edmund Davy, the ful¬ 
minates; Zeise, the xanthates, and the remarkable hydro- 
carburetted chlorides of platinum ; Dulk, the tartrates ; Grii- 
ner, the pyrotartrates; Mosander, the complicated salts con¬ 
taining three metallic cyanides -besides many others, whose 
valuable labours find a place in our systems of chemistry. 
The most important theoretical point connected with the 
history of the salts which at present occupies the attention of 
chemists,—that regarding the sulphur and chlorine salts,—has 
already been treated of in the former section. I shall here, 
therefore, introduce only a brief notice of a few of the most 
recent and interesting additions to our knowledge. 
Iodate of soda. —Liebig* prepares the iodate of soda by 
passing chlorine over iodine mixed with a little water till the 
iodine is all dissolved ; carbonate of soda is then added till sa¬ 
turation, when a considerable quantity of iodine is separated; 
this solution is poured off, a little more water added, and the 
operation repeated till saturation with soda ceases to throw 
down any iodine; the solutions are then evaporated to one 
tenth, and while hot an equal volume of alcohol added, and 
the whole set aside ; on cooling the iodate is deposited in starry 
groups of octohaedral prisms, which are to be washed with 
alcohol to free them from adhering common salt. 
The mode of preparing iodic acid from this salt has been 
already given. 
Carbonate of soda and lime.— Bauer has observed that when 
the solution of carbonate of soda, prepared by the usual ma¬ 
nufacturing process from Glauber’s salt, was cooled to 32°, a 
white crystalline powder was deposited, which effloresced in 
warm air, and consisted of carbonate of soda 36’2, carbonate 
of lime 34*1, water 29*8, = So C + Ca C-j-5 H. This is the 
same composition as the Gay-Lussite of Boussingault. 
The mother leys do not deposit the whole of the lime when 
thus cooled to 32° ; for when tested with oxalate of ammonia 
they give a white precipitate. It may therefore exist in the 
carbonate of soda of commerce. 
Carbonate of lime ;— Arragonite. —Mitscherlich f has de* 
scribed a very interesting crystal of arragonite, which, had it 
* Journ. de Pharm. 1832, p. 212. f Poggendorf’s Ann. xxi. p. 159. 
