206 Scientific Intelligence. 
of prussic acid, the most active poison known, even after it had gone 
far towards producing death. It is therefore credible, that it may 
destroy other poisons, having a similar constitution ; and we can 
readily understand the modus operandi in such cases; for chlorine 
takes hydrogen from every combination, and of course destroys the 
peculiar character of the compound. Prussic acid itself consists of 
nothing but the ordinary elements of animal matter, such as are daily 
used for food ; but in the acid they are combined. in a peculiar man- 
ner, and the withdrawing of hydrogen from it, at once subverts the 
combination, and renders it harmless. 
The practical use which we would make of the facts which we 
know, and of the theoretical views which we entertain, is, that chlo- 
ride of lime should be kept in every family ready for instant use in 
the multiplied cases in which it is applicable. 
It is already manufactured in this country in large quantities, and 
we observe with great satisfaction, that it is hereafter to form a part 
of the stores of our ships of war. This will greatly encourage the 
manufacture, and the time is not distant, when the price will be much 
less than at present.* 
* * * * * * * * 
We add with pleasure that Laparragur’s celebrated pamphlet on 
the uses of the cHLoRIDES oF Lime AND sopa has been recently 
translated by Dr. Jacob Porter, of Plainfield, Mass. and is to be 
sold by the principal booksellers. Some additions have been made 
by the translator, from recent publications, and we trust that. this 
little work will contribute to extend the knowledge of this subject. 
* * * * * * 
We would observe that as there are various chloric preparations, 
and of course an endless diversity of cases in which they may be ap- 
plied, we should not give over, even shouid they not prove effectual in 
every instance ; for some variety in strength, and mode of prepara 
tion, and application, may be necessary to accommodate the remedy 
to different cases. 
- 23. Crystallization of Tin.—Mr. Allard, rue.St. Lazare, No. 1}, 
“to whom we are indebted for the means of producing upon metal- 
lic plates, the most brilliant changeable lustre, creates also upo? 
tin plate a varied and splendid play, of light to which he has given the 
soe: ee ees sieht or nine dollars per ewt.—double this rate or a little 
