ACI-ACL 
Citric Acid.| Lemon-~Juice.| A seruple of Alkalies. 
gr. x. fZiij. Carbonate of potass. 
gr. xv. | f2iij. Sub-carbonate of potass. 
QT. XXv. fZvij. Sub-carbonate of ammonia. 
Citric acid, though called the juice of lemons, is 
contained in many other fruits, from which it may be 
obtained by the same process as from lemons or limes: — 
viz. the cranberry, bird cherry, solanum dulcamara, 
rosa canina or Hep, or fruit of wild briar. It exists 
in combination with malic acid, in the strawberry, 
rry, currant, bilberry, whortleberry, hawthorn, _ 
cherry, &c.; and in small proportion, in the 
berberry, elder-berry, sloe, service, plumb, &c. This 
accounts for the well-known fact, that the juices of 
these fruits soften and remove tartareous incrustations _ 
on the teeth. A recollection of the existence of this 
acid in the foregoing common fruits, will also enable 
the practitioner to direct or forbid them, in disease or 
conyalescence. : 
No. 15.—Acrtpum Hyprocyanicum; Acidum Prus- 
sicum. Hydrocyanic acid. Prussicacid. — 
Cabinet specimen, Jeff. Coll. No. 16. Pi: 
The most vehement, certain, and destructive poison 
known. This deleterious liquid was first introduced 
to somewhat general employment, as a subject of 
~ Materia medica, in the year 1815, by the London _ 
‘itioners—and since, by those of other places in- 
Britain and on the Continent, and in the United States, — 
This remark has reference only to the acid in its si 
ple, separate form—for the deleterious principle 
which it consists, was long known to exist in the 
distilled water of the Lauro Cerasus, a8 appears from 
the murder of Sir Theodosius Broughton by means of 
it, and also the suicide committed, in 1782, by Dr. 
Price, of Guilford, in vexation of spirit at his inability _ 
to prove the truth of his profession of a power to con- 
vert mercury into gold, aftribunal competent 
to decide on the fact. He puta period to his exist- _ 
ence, on the day before the appointed time of trial, —— 
by drinking laurel water. : a ae 
_ The medical employment of this article was also 
known long since. ‘Linnzus, in the Ammeznitates 
Academicz, published in the year 1765, mentions — 
