4o Caps to cork bottles and flasks.
It would be desirable to examine, in an economical point of view, the question of the preparation of preserved sugar, transportable to France, and giving, by a simple preparation, elastic caoutchouc/
Dye woods and other vegetable products.—Details on the working of dye woods, their qualities, uses, marks, would be interesting for technology.
It would not be less useful to send samples, branches, leaves and flowers of the usual plants, whose products are or may be applied to tanning; the extraction of oils, etc.
Remains of animals.—It is known that domestic animals, transported by Europeans to America, have multiplied and spread. It results from this that products which in Europe and particulary in France, are needed by agriculture and the different acts, are in great part lost in Brazil and several countries of south America. To send them to France or our colonies should be prepared:
1o For manure, blood coagulated by heat or lime, and dried;
2o For nourishment or manure, dried flesh;
3o Intestines prepared and dried which, blown up, might be employed to hold and preserve aliments which might be utilised as primary matters for different fabrications, such as for harmonic chords, whip cords, rattles, machines, gold beaters skin and cartridge paper; applications which one of the committee, M. Payen, discovered, by and which would employ all the remains of intestines useless for the usage we have described;
4o Tendons for glue factories.
There are other animal remains whose use has been long appreciated, horns, and feet, and skins. But the transportation of the first might be rendered less expensive by first pressing them down, and the last are, as it is known, often attacked on shipboard by insects. To prevent these injuries so hurtful to commerce the employment of different substances should be tried such as pyroligneous acid, the chloride of lime, the bichloride of mercury.