7 
Chemistry and Physics. 259 
the salt is dissolved in a solution of sulphate of lime saturated at 68° 
F., and the residue of gypsum washed with the same liquid. In this 
manner the loss which would occur on edulcoration with water is avuid- 
ed. Nine grms. of salt were mixed with one grm. of sulphace of 
0:995 grin. gypsum was re-obtained, ‘The method may therefore be 
5. Method of detecting the Adulteration of Cane-sugar with Starch- 
sugar, aud the Syrup of the former with that of the latter ; by Dr. G. 
eIcu, (Chem. Gaz., Nov. I, 1847, p. 433, {rom Archiv der Pharin., 
1, p. 293.)— When a boiling saturated solution of bichromaie of pot- 
Sugar svrup is treated in the same manner, a very different behavior is 
Observed, and which may be employed to distinguish these Iwo kinds 
of sugar; the starch-molasses has not the least action on the bichro- 
mMue of potash; and when mixed with cane-sugar molasses to the 
amount of 4-4, prevents the reaction of the latter; the mixture 
cane-sugar, and the mixture heated to boiling, a violet-blue ote! ae 
A ‘ : . ii f : arops 
falls, even when the solution is diluted, on the addition of a few drops 
>? : ¥ : 
48 violently on the bichromate of potash as the syrup of can Se KG 
the liquid, however, does not become green, but retains Is and in 
recommends jt. sef-root suger vil ; : 
Cobalt as Cane-sugar. Milk-sugar prevents the precipitation of the 
Nitrate of evbalt by potash, like grape-sugar. Herzog at the ae ios 
tts that mannite, when boiled with sulphate of copper an eae 
immediately reduces the oxyd of copper, which is not the case accord: 
Seconp Senizs, Vol. V, No. 14.—March, 1348. 
