220 
ON CHLORINATED CHLOROHYDRIC ETHER. 
obtained by adding the tincture to sugar, allowing the alcohol to 
evaporate, and making it into syrup the usual way. As thus pre- 
pared it shows a slight milkiness. A better plan is the following, 
by which a syrup may readily be made of double the strength of 
that of the Pharmacopoeia, and perfectly clear. 
Take of Tincture of Tolu, two fluid ounces, 
Carbonate of Magnesia, two drachms, 
Sugar, a pound and a half, (Avoirdupois.) 
Water, twelve fluid ounces. 
Rub the tincture of tolu with the carbonate of magnesia and two 
ounces of the sugar, in powder, gradually add the water, and filter. 
The remainder of the sugar is then dissolved in the filtered liquid 
by means of a gentle heat. 
Syrup of Ginger. — A stronger and more perfect syrup can be 
prepared by making a ginger water by the process directed above 
for syrup of Tolu, and dissolving the sugar in it with a gentle 
heat. 
TWe have tried Mr, Finley's processes as given above, and find them to 
produce syrups agreeably aromatic, especially in the instance of ginger. 
An accidental advantage of the use of magnesia in the preparation of syrup 
of tolu, is the saturation of the benzoic and cinnamic acids : — on the other 
hand, one seventh of the menstruum is alcohol, which, in a great measure 
remains in the syrup, and gives it an alcoholic flavor. If this was removed 
without injury to the aroma, the formula would be unexceptionable. In 
the ginger syrup the proportion of alcohol is less, and its presence is hardly 
perceptible. The aromatic taste of this syrup, derived from the volatile oil, 
is perfect, but the pungency which depends on the soft resin, is less marked 
than in the officinal syrup, although sufficiently so to render it, very agree- 
able, especially for mineral water purposes. — Editor.] 
ON THE CHEMICAL AND PHYSIOLOGICAL PROPERTIES OF 
CHLORINATED CHLOROHYDRIC ETHER. 
By M. Mialhe & M. Flourens. 
Dr. Aran having requested us to place at his disposal the differ- 
ent volatile agents, to which anaesthetic qualities had been attri- 
buted, with the intention of studying, with more care than had 
hitherto been given to the subject, their sedative action, we 
