PAP—PAP 
opium and it, then digest in Spt.-Vin. Rect. Zviij, 
acid acetic ay Zj, aqua, Fy for seven days, and filter. 
This preparation will be found to possess great advantages 
over | and the black drop of the shops,.to which 
it will be much preferable, inasmuch as it will be destitute 
of the stimulating principle, (narcotine,) which exists in 
the black drop, eV ich is attributed the distressing 
effect which frequently forbids the use of opium, where 
~ it otherwise might be extremely useful. The addition of 
acetic acid, contributes much agus beg or 
ive principle. By its union with morphia, it forms 
gee sy lire Seaatrs salt of zs mes ‘(acetate of 
_ morphia,) and differs only from the solution of the acetate 
_ of morphia of the shops, in its state of purity; and as the 
_ extraneous matter, with which it is associated, has no ef- 
fect on the animal system, it may be considered as good 
an article, and should be preferred for general use, in con- 
“Sequence of being much less expensive.” 
Hare has contrived a method, by which he informs: 
uantity of opium, not exceeding that contained 
n 10 drops of laudanum, may be detected in half a gallon 
of water ;” this is a discovery which may be applied to 
useful pe T subjoin.his own account of it, from 
the Journal already quoted :— 
= 
Bae 
‘*My process is founded on the property which meconic acid 
i has of precipitating with lead. Hence, by adding a few 
; drops of lead to any infusion, containing any 
ant the drug in question, not more minute than 
the p }above mentioned, an observable quantity 
of the meconate of lead falls down. The precipitation, 
where the quantity is small, may require from six to twelve 
hours, and. may be facilitated by a very gentle stirring 
se with a glass rod to detach the flocks from the sides of the 
recipient, which should be conical, so as to concentrate 
— pes Sa descent. The meconate being thus 
collected at the bottom of the vessel, let about thirty drops 
of sulphuric acid be poured down on it by means of a atin 
as much of the red sulphate _ 
ase sk. testimony of Dr. Dewees, in favour of the use of denar- 
