" I take this opportunity of remarking that it is my firm conviction, that the arsenetical soap can never be used with any success, if you wish to restore the true form and figure to a skin.

I fear that your cort-espondent may make use of tight boxes and aro- matic atmospheres, and still, in the end, not be completely successful in preserving his specimens from the depredation of insects.

The tight box and aromatic atmosphere will certainly do a great deal for him ; but they are liable to fail, for this obvious reason, viz that they do not render, for ever, absolutely banefuland abhorrent to the depredator, that which in itself is nutritious and grateful to him.

In an evil hour, through neglect in keep- ing up a poisoned atmosphere, the specimens collected by your correspond- ents industry, and prepared by his art, and which ought to live, as it were, for the admiration of future ages, may fall a prey to an intruding and almost invisible enemy : so that, unless he apply the solution of corrosive sublimate in alcohol, he is never perfectly safe from a surprise.

I have tried a decoction of aloes, wormwood, and walnut leaves, thinking they would be of service, on account of their bitterness : the trial completely failed.