242 
ON THE CHLORIDE OF ZINC. 
The following is the formula I have used in preparing 
the solution: 
Take of granulated zinc 1 pound (av.) 
" Hydro-chloric acid, 4 pounds, or a sufficient 
quantity. 
" Water, 2 gallons and 2 pints. 
Add successive portions of the acid to the zinc in a glass 
or porcelain dish, until it is dissolved, taking care that the 
acid is not in excess, then strain through a coarse linen cloth, 
and add the water. 
This solution contains about 1 part of the chloride in 12, 
which is believed to be the maximum strength required. It 
is a transparent, colourless liquid, of the sp. gr. 1.090. It has 
been found to diminish and generally to arrest decomposi- 
tion even in very offensive subjects, and to destroy, to a great 
extent, the effluvia so generally proceeding from them. 
When it is desirable tu keep a concentrated solution for the 
preparation of the above extemporaneously, the addition 
of the water, as prescribed in the formula, may be dispens- 
ed with, the first product being retained. This is a trans- 
parent liquid, of a light straw colour, having the sp. gra- 
vity of 1.579. It is highly charged with the caustic proper- 
ties of the chloride, and would he suited to many purposes 
of the physician, though owing to the impurities existing 
in commercial zinc and acid, it should not be used as an 
internal remedy without the proper precautions to insure 
its purity. The addition of a gallon of water to every pint 
of this solution, will make a liquid corresponding to that 
recommended for anatomical purposes. 
