ON SYRUPS OF TOLU AND GINGER. 219 
ing, deposits cinchonic red, and becomes turbid. All the alkaloids 
are in solution, however, and by suffering the fluid extract to stand 
until the cinchonic red is deposited, it may be decanted perfectly 
transparent. It is exceedingly bitter to the taste. 
More recently, Mr. Alfred B. Taylor, Pharmaceutist of this city, 
has made a fluid extract of calisaya bark, which is, perhaps, pre- 
ferable to either of the foregoing, inasmuch as it presents the alka- 
loids in an unaltered condition, and yet fully exhausts the bark. 
The following is his process : — 
Take eight ounces (Troy) of calisaya bark in a uniform coarse 
powder, moisten it with diluted alcohol, and after standing twelve 
hours, pack the moist bark properly in a percolator, and pour di- 
luted alcohol on it gradually until four pints of tincture have 
passed, or until its bitterness is exhausted. Evaporate the tincture 
in a water bath (or a still) to nine fluid ounces, then add fourteen 
ounces (Troy) of sugar, continue the heat until it is dissolved 
and strain, whilst hot, if necessary. 
This preparation like the preceding, is transparent, and dark 
reddish brown coloured whilst hot, but on cooling it becomes tur- 
bid to a greater degree, owing to the separation of the cincho-tan- 
nates of the bark alkalies. For the reason that a part of these are 
in an insoluble form, this fluid extract is less bitter and disagreea- 
ble than that made with acidulated water. It has the same theo- 
retical strength, a teaspoonful being an ordinary dose, and it affords 
a very eligible means to the physician, of prescribing bark either 
alone or in combination with other agents, without the delay 
necessary to make an infusion. 
Dr. John F. Meigs, who has used the fluid extract made by Mr. 
Taylor's formula, speaks favourably of its advantages. 
ON THE SYRUPS OF TOLU AND GINGER. 
By John D. Finley. 
[Extracted from an Inaugural Essay on Syrups.} 
Syrup of Tolu. — As this syrup is prepared in the present Phar- 
macopoeia [Edit. 1840] it is in the form of a mixture ; in the New 
Pharmacopoeia it will be prepared from an aromatized sugar, 
