VARIETIES. 
171 
the substances which have been injected with the preserving liquid, are not 
injured even when immersed directly in the liquid, and left there for twenty- 
four hours. — Comptes Rendus. 
Iodine rendered soluble by Syrup of Orange-peel and Tannin. — M. De- 
banque mentions, in the Journal de Pharmacie of Antwerp, that he has found 
means of keeping iodine in a state of solution, when added to mixtures in 
the form of tincture. The author uses for that purpose syrup of orange- 
peel, which answers the purpose perfectly. It was suspected that tannin 
was mainly instrumental in this result; and this was rendered evident by 
putting a few grains of tannin into a quantity of water to which tincture 
of iodine has been added, and in which the iodine had of course been pre- 
cipitated. The addition of the tannin caused the iodine to be immediately 
re-dissolved. Thus will the syrup of orange-peel be advantageously added 
to mixtures containing tincture of iodine, and tannin to injections composed 
of water and the same tincture. — Med. Exam, and Lancet. 
Cement for Mending China, &c. — Take of isinglass two drachms, sprinkle 
it with water and allow it to stand until softened, then add as much proof 
spirit as will rather more than cover it, and dissolve with a moderate heat. 
Take of gum mastic one drachm, dissolve it in two or three drachms of 
rectified spirit. Mix the two solutions, and stir in one drachm of gum 
ammoniacum, previously reduced to fine powder and rubbed down with a 
little water. Evaporate, if necessary, in a water-bath to a proper consis- 
tence. Keep the cement in a bottle. When required for use plunge the 
bottle in warm water, and apply the cement with a stick or a small hard 
brush to the china previously warmed. Compress the pieces firmly together 
until cold, taking care to make the contact perfect, and using a very thin 
layer of cement. When properly applied the cement is almost, if not quite, 
as strong as the china itself, unless exposed to the combined action of heat 
and moisture. 
Another cement, useful for many purposes, may be made by dissolving 
isinglass in glacial acetic acid, and reducing it to the consistence of a thin 
jelly. It may be applied in the same manner as the above, but does not 
require to be warmed. — Pharm. Journ. 
On the proportions of Iodine contained in Cod-Liver Oils. By MM. 
Chevallier and Gobley. — We have followed the process indicated by MM. 
Girardin and Preisser. It consists, as is known, in saponifying the oil by 
an excess of a solution of caustic soda, at 25 degrees, then heating it, with- 
out allowing it to boil, until a perfect combination takes place, and after- 
wards evaporating the whole to dryness. The soap obtained is to be 
carefully carbonized in a closed crucible ; towards the end of the carboniz- 
ation a sufficient quantity of carbonate of ammonia is to be added to con- 
