ere and there where the bitumen is mixed these deficiencies when practicable by the judicious trade fell off somewhat, owing to the competition of with earthy matter grow lichens, mosses, grasses, etc. application of fertilizers or by a suitable rotation of American oil. The home demand for oil,… … tute, Philadel- walk upon; AND CABS OF THE DIVISION OF THE DEPABTMENT OF AGEICULTURE, D. C—THE VEGETATION HOUSE WASHINGTON, phia, is making but a curious CHEMISTRY FOB THE STUDY OF SOILS. an appeal for result ensues if you stand still s u bscriptions It is of the utmost impor- for any length of…
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