6º The size, direction and consistence of the plant. If it is a tree of some size, and if the traveller can sketch, it would be well to give a drawing of its form, especially for palms and other monocotyledons; common trees, if there is no sketch made or them, they may be compared to some of the best known trees in Europe; 7º Numbers should be written on the separate samples of the fruits, seeds, flowers, or wood of the same plant, which form the parcel the traveller sends, as well as on the samples of the same plant that he keeps and on his catalogue or journal, so that he can afterwards give accurate information of the plants he sends. These numbers should not be repeated during the same tour, but should form a series, to avoid confusion. If the traveller can measure, or knows the height above the sea of the regions he travels over, he should add to the note relative to each plant a statement of the height where it was found; the exact height is not necessary. If he does not know the height, the omission can be partially remedied by the most remarkable and abundant vegetables that grow around[4]. [4] On mountains, each species of plants only grows to a determined hight, trawellers can therefore notice the most remarkable of them either by their shape, size or their abundance, indicating them by their names or by figure; and point-out by lines where these species cease growing adding a certain number of zones and indicating the zone in which each plant grows. Dry fruits should be sent in boxes with a label and number corresponding to that of the branch of the plant, in the herbal, to which they belong. All the dry fruits of too large size to be well preserved in herbals, should be collected separately, the ripest chosen, dried carefully and wrapped in paper. Those of palms, pandanus, zamia, conifers, proteacees, lecythidees, cucurbitacees, the leguminous family, the bignonias, bombacees, sterculiacees, especially deserve to be collected separately. Pulpous fruits should be sent in weak alcohol at 18 deg. in acetic or pyro-liqueous acid dissolved in water, or in water saturated in marine salt, if these two first liquids can not be had, for the preservation of objects is much less certain and less perfect in this fluid. Each kind should be put in a separate jar and envelopped in cloth, flax or cotton, or if several kinds are put in the same jar, each kind should be put in separate bags with special labels. Among the pulpy fruits that deserve to be collected, we shall particulary point out those of several palms, many of the Bromiliacees, resembling the ananas, aroidees, sapotees, and Diospyrees; several annonacees, the pulpy-fruited Capparidees, Papayers, the soft-fruited Cucurbitacees, Guthifers, Aurantiees.