266 Scientific Intelligence. 
ash is formed, from which pure malonie acid is easily obtained. Kobel 
represents the reaction in this case by the equation 
H 7 C,0 
KO, C, o2N ¢[0,0,]0+KO.3HO=2KO. [CoH.)"| ¢2 02 [Ost HN. 
e pr 
me process @ 
small quantity of a crystalline acid was prepared, which on being heated, 
au- 
inal paper. We design at present only to notice a single point, the rela- 
tions, namely, of thallium to the alkaline metals. Crookes maintains 
that it belongs to the same group with silver and lead, (sic) a view which, 
as he says, is generally taken in England. It seems difficult to under- 
thallium show plainly that it is essentially monatomic, and the very inter- 
esting discovery by Church of a silver alum only illustrates the analogy 
tw 
N 
ded metallic cobalt is heated with a strong solution of caustic potash, 4 
deep blue solution is formed which proves on analysis to be a co 
of . Cobaltic acid has the formula CoO,, and belongs therefore 
to the group of manganic, ferric and chromic acids. The blue solution 
