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Dye woods and other vegetable products. — Details on the working of dyewoods, their qualities, uses, marks, would be inleresting for technology.

It would not be less useful to send samples, branches, leaves and flowers ofthe usual plants, whose products are or maybe applied to tanning; the extractionof oils, etc.

Remains of animals. — Itis known that domestic animals, transported by Eu-ropeans to America , have multiplied and spread. It results from this that pro-ducts which, in Europe and particular in France , are needed by agriculture andthe different acts, are in great part lost in ISrazil and several countries of southAmerica. To send them to France or our colonies should be prepared:

1° For manure, blood coagulated by heat or lime, and dried;

2« For nourishment or manure, dried flesh;

5o Intestines prepared and dried which, blown up, might be employed to holdand preserve aliments' which might be utilised as primary matters for differentfabrications, such as for harmonic chords, whip cords, rattles, machines , goldbeaters skin and cartridge paper; applications which one of the committee,M. Payen, discovered, by and which would employ all the remains of intestinesuseless for the usage we have described;

4° Tendons for glue factories.

There are other animal remains whose use has been long appreciated, horns,and feet, and skins. Put the transportation of the first might be rendered lessexpensive by first pressing them down, and the last are, as it is known, oftenattacked on ship-board by insects. To prevent these injuries so hurtful to com-merce the employment of different substances should be tried such as pyroligneousacid, the chloride of lime, the bichloride of mercury

If naturalists wish to try these different processes, we doubt not that merchants,for whom this question is one of great interest, will assist their experimentsby all the means in their power.

An appeal is likewise made to agricultures for seed of north American foresttrees.

rims.

l-arls. — Imprimerle de Paul Dupont,rue de GrenelleSt-Honore, 85.