ON THE ACIDS OF THE NATIVE CURRANT. 121 
increase of weight ing produced. In this way 5 grammes of sub- 
stance yielded 1:153 CaCo,=1-983 calcic malate=1‘544 malic 
= 31 per cent. nearly. As the original substance gave off 
12 per cent. of water at 100°, and was found to contain on 
titration about oes Ae cent. of Na,Co, (added in excess), the 
above numbers t be increased considerably ; so that we find 
the quantity of 1 pape acid in the solid residue produced by _ 
neutralising the juice with rag ge of soda and evaporating to 
dryness, to be over 40 per c This is, of course, a very rough 
estimation, and probably boas the truth, inasmuch as it is impos- 
sible to precipitate the whole of the calcic malate by the above 
method ; still it serves to show that the juice of the Native Currant 
is capable of yielding a very large percentage of malic aci 
The filtrate after the chor eae of the calcic malate was not 
very carefully examined, but appeared to contain little else but 
unprecipitated calcic malate and some organic colouring matter ; 
and it is evident that since the sodic malate, water, excess of sodic 
carbonate, sodic tartrate, ash, &c., will ma ake a total of somewhere 
near 70 per cent. of the whole, the residue, after subtracting the 
—— matter, such as gum, colouring matter, &e., must 
very small, and Werciiss it was not thought worth "while to 
pe any further examination. 
ash formed on ignition contained a mere trace of carbonate 
of onstl showing that very little of the acids could have been pre- 
sent as calcium ts. Very considerable quantities of potassium 
carbonate were however found. 
