4S6 
ORIGINAL AND EXTRACTED ARTICLES. 
NOTES AND ABSTRACTS IN CHEMISTRY AND PHARMACY. 
BY C. H. WOOD, F.C.S. 
Guyot’s Concentrated Tar Solution. 
In the current number of the 4 Journal de Pharmame’ is a paper by Dr. 
Jeannel on a preparation of tar known in commerce as 44 Guyot’s Concentrated 
Tar Solution.” From an analysis of this liquid, the author has deduced the fol¬ 
lowing formula for its reproduction :— 
Bicarbonate of Soda ... 22 parts. 
Tar (from Wood) .... 25 ,, 
Water. 1000 ,, 
Macerate together for eight days, shaking the mixture several times each day. 
The decanted fluid is identical in all respects with the commercial article ; it 
has the same colour, transparency, and alkalinity ; it possesses the same power of 
mixing with water without turbidity, and contains the same proportion of tarry 
matter. 
M. Jeannel considers this liquor as very inferior, therapeutically and prac¬ 
tically, to the emulsion of tar which he originally devised. This emulsion was 
made with 
Tar, 
Carbonate Soda, aa . . . . 10 parts. 
Water. 1000 „ 
and, according to the author, contains four times less saline matter, and four 
times more tar, than Guyot’s preparation. 
The latter (Guyot’s) solution, diluted with sixty or eighty times its volume 
of water, forms a clear tar-water for internal administration ; in a less diluted 
condition it is also employed as a lotion. 
Syrup of Violets, Prepared with Dried Flowers. 
Syrup of Violets can only be made once a year, when the flowers are in sea¬ 
son. M. Bouilhon finds this frequently occasions inconvenience to the pharma¬ 
ceutist, because as the syrup does not keep very well, it is not desirable to prepare 
too large a stock, and hence it every now and then happens that the syrup is 
exhausted before the fresh flowers are attainable. To mitigate this annoyance, 
M. Bouilhon has devised the following formula by which a syrup may be pre¬ 
pared from the dry flowers :— 
Dry Violet Petals .... 2 grammes ( 40 parts). 
Boiling Distilled Water . . 100 ,, (2000 ,, ). 
Citric Acid, about ... 5 milligrammes (JL. ,, ). 
Infuse four hours in a tin vessel, strain off the infusion, pour a little water on 
the residue, and squeeze out until 100 grammes of liquor are obtained. Make 
this into syrup in the usual manner. 
Chloroform in the Urine. 
The urine of patients who have inhaled chloroform, when tested with sulphate 
of copper and potash, gives a copious indication of the presence of sugar. The 
result, however, is not due to sugar, but to the chloroform. Traces of the latter 
substance in the urine cause a reduction of the oxide of copper in precisely the 
same manner as glucose. The presence of chloroform in urine may be detected 
by causing a current of air to bubble through the urine, then to traverse a red- 
