260 
MISCELLANY. 
in part, though it still remains to discover why the developement of the 
essential oil is greatest with the cold water. It may arise from the hot 
water and vinegar coagulating the albumen, and thus preventing the 
extrication of the essential oil, whilst the cold water, by dissolving this 
substance, removes every obstacle to the formation of the oil. 
The discoveries of these chemists have also another practical bearing : 
thus, in mustard baths, where it is thought advisable to use vinegar 
or hot water, the flour of mustard should be first mixed with cold water 
to develope the essential oil, and then the hot water or vinegar added. 
Bull. gen. de Therap. 
Nitric ether. — M. L. Piette of Toulouse states that the following method 
of making nitric ether has always afforded him good results. 
Nitric acid at 34° lbs. ij. 
Alcohol 36° lbs. iiss. 
are to be mixed in a mortar and poured into a mattrass; this is to be placed 
on a sand bath, and one end of a large glass tube adapted to it, the other 
end of the tube being attached to a tin worm passing a refrigerator filled 
with ice or snow. The apparatus is well luted and heat applied. The 
ether thus obtained, on being rectified, marks 36°. It should be kept in 
black bottles. Ibid. 
Formulas for Staining the Hair. — M. Julia De Fontenelle has given 
many recipes for this purpose, some of which he states are possessed of 
very little power, whilst others answer the purpose fully. 
Forestier's Liniment. 
Red wine, Oj. 
Chloride of sodium, £i. 
Shoemaker's black dye, ^ij. 
Boil for a few minutes and add oxide of copper, 3j. 
Boil again, and add a sufficient quantity of powdered galls. Evaporate 
to a honey-like consistence. The hair is to be rubbed with this, and after 
some time to be washed with pure water. 
Gruling^s Dye. 
Boil an ounce of green galls in sufficient quantity of oil till they burst, 
and then add 
Chloride of sodium, 
White wax, oa £ij» 
Powdered alum, ,5iij. 
Cloves, 3j. 
Boil and keep in a close vessel in the dark. 
