Among those sent, there will be many we have received before; but they will not be useless. Plants preserved in herbals, which we already possess, will be employed in forming special herbals for different countries, very useful for the study of botanical geography and to facilitate the researches of travellers, either by making exchanges, with foreign museums, or to enrich the principal museum of the departments. Besides, there are always objects that corrupt by time, which it is useful to renew. Collections of plants, from whatever country they come, have always a certain number of plants which the museum does not possess, or offers them in a different state from those we possess and so are always interesting, when well made; but there are countries little known, from which we desire to receive all that can be collected. The North-America: the Floridas and southern parts of Louisiana, Arkanzas and Texas, a great part of Mexico, particulary the northen part, as well as California, the southern part of Mexico, and the countries comprehended between that state and the isthmus of Panama; the great iles of the Antilles, Haiti, Cuba and Jamaica, though formerly explored, are now scarcely represented in our herbals. Botany is already cultivated with success in many countries. Travellers can, sometimes, find herbals already collected; it would be useful to procure them, especially if they have but a short time to stay or even a single season, after assuring themselves that these herbals are made with care. This would be important, especially in countries where the flora has been treated by some resident botanist, and the kinds and species proper to these local floras should, if possible, be obtained. _Collections of wooden stalks or trunks of trees_. This collection should be made in a different manner, for the trunks of the _monocotyledons_ and ferns, and for those of the _dicotyledons_. For the first, such as the palms, vaquois or pandamas, the dracoena or dragoniers and the ferns in trees, etc. whose structure varies in height according to the age of the trees, it would be desirable to obtain grown and entire trunks, from the root to the top of the tree, when transportation can be affected without difficulty or expense. But when the size of the trunks and difficulties of transportation are so great that it can not be conveyed entire, it should be sent in three pieces of 50 centimetres each in length, taken, the first at the base with the roots, the second in the middle, and the third from the top with the first clusters of leaves. When the trunks are very large, damp and hard to dry, it is well, to quicken their drying, to split them lengthwise through the middle, but the two halves should always be sent and round pieces cut cross wise from 6 to 10 centimetres thick.