NOTES AND ABSTRACTS IN CHEMISTRY AND PHARMACY. 647 
C. The Silvering Mixture .—50 volumes of A, 10 volumes of B, and 250 to 
300 volumes of water. The temperature of the mixture should be 70° or 80° F. ; 
if necessary, therefore, warm water may be used. 
Ordinary glasses may be supported in this liquid vertically; but lenses, etc., 
destined for optical instruments should be suspended horizontally at the surface 
of the liquid. The layer of silver is brilliant, and of sufficient adherence to ad¬ 
mit of polishing. The copper salt is necessary to the production of a uniform 
deposit. 
The Substitution of Sodium for Phosphorus in Lucifer Matches. 
The 4 Chemical News’ describes the result of some experiments by Dr. Fleck, 
of Dresden, on the manufacture of non-poisonous matches by the use of sodium 
in place of phosphorus. The paste employed is composed as follows :— 
Sodium.0-5. 
Nitrate of Potash. 66 0. 
Sulphide of Antimony .... 36*5. 
The sodium is granulated by agitation in melted paraffin, and incorporated 
with the other well-dried ingredients in metal mortars under petroleum. The 
necessary adhesiveness is given to the mass by caoutchouc previously soaked in 
light petroleum oil. 
A New Styptic Collodion. 
Mr. Carlo Pavesi gives in the ‘ Gazette de Turin’ the following form for a 
new collodion :— 
Collodion . ..100. 
Carbolic Acid.10. 
Tannin.5. 
Benzoic Acid.3. 
Agitate until a perfect solution be formed. It is of a brownish colour, gives 
a pellicle similar to ordinary collodion, and instantly coagulates blood. 
Iron Sugar. 
A new preparation of iron has been recently introduced into medicine by 
M. C. Chautrand, under the name of Sucre Ferrugineux. It is in the form of 
small distinct cubical crystals of cane sugar, having a reddish-brown colour due 
to the presence of a portion of peroxide of iron in a soluble condition diffused in 
and upon each crystal. When introduced into cold water it dissolves, forming 
a deep red solution, only a trace of the oxide of iron remaining insoluble.. If 
the solution be boiled or kept for some time, the oxide is precipitated. 
This preparation appears to contain nothing but a pure hydrate of peroxide of 
iron associated with the cane sugar. The proportion of iron present is not large, 
but the compound is pleasant to the taste, and is intended to be taken in doses 
of two to four teaspoonfuls half an hour after meals. 
Ammoniacal Extract of Valerian. 
M. Dannecy has introduced into pharmacy an extract of valerian prepared 
with ammoniacal alcohol, which he names “ Le valerianate extractif d’ammo- 
niaque.” It is prepared as follows:—100 grammes of coarsely-powdered valerian- 
root are introduced into a percolator, and a mixture of 80 grammes of alcohol 
at 140° F., and 20 grammes of solution of ammonia at 70° F., is poured on. 
When this liquid has passed through, sufficient spirit at 140° F. is employed to 
displace a weight of ammoniacal tincture, equal to that of the valerian ope¬ 
rated on. This tincture is then evaporated, with constant stirring, at a tempe¬ 
rature not exceeding 160° F., until a soft extract is obtained. The extract is 
administered in gelatinous capsules, each containing 5 decigrammes (7’7 grains). 
