MISCELLANY. 
261 
These two preparations are by no means equal to the following : 
Paste of Zimara. 
Quicklime, lbj. 
Litharge, 
Lead ashes (sub. oxide,) na jjj. 
Slack the lime and make a paste of it with the two preparations of lead, 
and keep in a well closed vessel. 
Paste of Ambrose Pare. 
Quicklime, ^xij. 
Litharge, ^ v iij« 
Decoction of sage, ^xxviij. 
To be well mixed and applied to the hair for four or five hours, which 
should be previously washed with a solution of alum, and after the re- 
moval of the paste, with bran water or the yolk of an egg. 
There are many patented compounds for this purpose, the principal of 
which are : Quicklime 1 part 
White lead or litharge 1 
Or, Quicklime 8 
White lead 
Litharge qa 5 
Or, Quicklime 2 
White lead 2 
Talc 1 
When either of these are to be used, the hair is to be washed with tepid 
water, a paste is then to be made with the powder and boiling water, 
with which the hair is to be thoroughly embued, and the head then cover- 
ed with an oil-skin cap, taking care that no pressure be used, otherwise 
the paste will come in contact with the skin of the head and inflame it. 
Four or five hours afterwards, the cap is to be removed, and the powder 
adhering to the hair brushed out, which is then to be washed with tepid 
water, and afterwards with the yolk of an egg. Jour, de CJiim. Med. 
Liquefaction of hydrosulphuric acid. — An ingenious method of doing 
this has been devised by M. Kamp. It consists in introducing dry per- 
sulphuret of hydrogen into a closed tube; this body is gradually changed 
into liquid hydrosulphuric acid, and deposits crystals of sulphur. Hydro- 
iodic acid gas may also be liquified, by introducing into the tube, a little 
dry iodine and then adding persulphuret of hydrogen, this rapidly dis- 
solves the iodine, and forms a yellowish brown liquid. Now, if by 
means of a peculiar curvature of the tube, a very small quantity of water be 
added, a rapid reaction ensues, sulphur is deposited and there is a produc- 
tion of liquid hydroiodic acid. The least trace of water is sufficient to de- 
compose the brown fluid, which is probably composed of hydrogen, iodine 
