Tell the substratum on which the specimen was found—as boulders, limestone, sandstone, log or stump, fence-rail, tree or plant, soil, etc. Give additional notes as to appearance, size, abundance, habitat, habit, etc. Those growing on rocks can not generally be removed—a thin piece of rock must be chipped off to secure them. A detailed description should be written of each kind (species); drawings perhaps might be undertaken; the different species should be compared and contrasted. Use a good pocket lens. There is no text-book on Lichens that is usable by beginners. DENDROLOGICAL.—The Trees may be studied from one of several points of view. If a camera be used, selected trees should be studied and illustrated; the bark compared in case of different species, likewise in case of one and the same species when the individuals are of different ages and sizes or grow in different situations or exposures; also modes of branching compared and shapes contrasted. Very full notes should be taken, and when written up in the report reference should be made constantly to the numbered illustrations. Few or many kinds of trees, as preferred, may be taken if this phase of the subject is selected. Instead of the above one may study and identify all the kinds (species) of trees in the region. Full descriptions should be written out, and similarities and contrasts of different species noted. Give uses of the kinds of woods only when such use is made in the region or the near town or city. Collect twigs and fasten them to card-boards (8¼ × 11½ inches). Attach a specimen of the fruit also when it can be found under the tree. A pamphlet (price 10 cents) with a Key to the Ohio Forest Trees by means of which the names can be determined, may be obtained from the writer. A third method of carrying out the work on trees would be to give an account of the forest area in the region—either taking a square or rectangular tract of a mile or more in extent; or selecting if possible a natural area, as a river or creek valley, or other obviously bounded tract of ample dimensions. Draw a map of the selected region and locate thereon the forests and groups of trees. Describe them, indicating the prominent kinds of trees, the less abundant species, and the very rare ones. Tell approximately the size of the largest, the commonest size, etc. Note uses made of some of the kinds in the region or at a near manufactory. Record other observations. MINOR PLANT NOTES, NO. 2. W. A. KELLERMAN.