ETHER HYDROCHLORIC; CHLORINAT: or ether hydrochlorique chlorè, as the French have it, is another change, rung by M. Mialhe of Paris, with the transcendental compounds of carbon and chlorine. It is a mongrel preparation, intermediate between hydrochloric: ether and chloroform, professing to have the advantage of not irritating the skin like the latter. If this be so, experience will tell, and also whether the irritation is not proportionable to the effect. With regard to such a refinement of an already infinitesimally delicate class of preparations, I should suppose it would be {106} desirable to effect the object aimed at by them, by if possible some more palpable method, as for instance diluting chloroform either with hydrochloric ether or alcohol, to the necessary mildness, or by interposing between it and the skin, a thin moist layer of some substance, as bibulous paper, which would not interfere with the rigefacient effect of evaporation, and would prevent any injury arising from actual contact.
INDELIBLE INK. BY M. GUILLER, OF PARIS.
Hitherto the various inks prepared for marking linen, have but imperfectly answered the end proposed. Some produced yellowish marks; others though blacker at first, disappeared either partially or entirely after several washings.
Again, others, in separate bottles, necessitated two distinct operations, and were thus attended with inconvenience, from the possibility of mistakes or forgetfulness, from the care required, and also from the time taken up in the operation.
In view of these difficulties, and to meet a demand constantly occurring in commerce, and in all kinds of manufactures, as well as in hospitals, and civil and military administrations, we have applied ourselves to the composition of an ink free from all these objections, and perfectly easy and certain in its application.
We shall subjoin some formulæ for the manufacture of marking inks, which represent particular improvements, as can be verified by trying them.
| Nitrate of silver, | 11 grammes, |
| Distilled water, | 85 grammes, |
| Powdered gum arabic, | 20 grammes, |
| Sub-carbonate of soda, | 22 grammes, |
| Solution of Ammoniæ, | 20 grammes. |
Dissolve the 22 parts of sub-carbonate of soda in the 85 parts of water; put into a marble mortar the gum, and pour on {107} it very gradually the solution of the sub-carbonate, stirring it with the pestle to cause it to dissolve.
In the mean time, you will have dissolved the 11 parts of nitrate in the 20 parts of liquid ammonia. Mix the two solutions; put the whole in a matrass and expose it to heat. The mass which was of a dirty grey color, and half coagulated, becomes clear and brown, and when arrived at the boiling point, it becomes very dark, and sufficiently limpid to flow readily in the pen. This ink, made without heat like the two following forms no sediment, the ebullition thickening it, and besides giving the ink a very dark color, disengages the ammoniacal vapors, which attenuate the odor of the ammonia in it.