Farmers' Bulletin, Issues 726-750

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U.S. Government Printing Office, 1918 - Agriculture
 

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Page 4 - growing season" is applied to the period between the last killing frost in the spring and the first killing frost in the fall.
Page 149 - Chief. Bureau of Chemistry and Soils HG KNIGHT, Chief. Bureau of Entomology CL MARLATT, Chief. Bureau of Biological Survey PAUL G. REDINGTON, Chief. Bureau of Public Roads THOMAS H. MACDONALD, Chief. Bureau of Agricultural Economics NILS A. OLSEN, Chief. Bureau of Home Economics LOUISE STANLEY, Chief. Plant Quarantine and Control Administration.
Page 6 - To prevent decay it is necessary to deprive the fungus of one or more of these four requirements. It is out of the question in ordinary situations to deprive it of air and warmth, and though moisture can sometimes be eliminated to a certain extent, this cannot be done when the wood is exposed to the weather. In general, therefore, the most effective method of preventing decay is to poison the food supply; and upon this principle is based the successful use of wood preservatives.
Page 174 - A, A diseased white-pine tree with the blisters broken open, spreading the disease to any currants or gooseberries that may be in the vicinity; B, early summer stage on the lower surface of a currant leaf, repeating on currant leaves during the rest of the season, a new crop of spores appearing every two weeks ; C, early summer stage much magnified; D, late summer and fall stage on the lower surface of a currant leaf, spreading the disease back to neighboring white pines. (Farmers
Page 31 - The Size of the Trap. — The conical hoop trap consists essentially of a screen cylinder with a frame made of barrel hoops, in the bottom of which is inserted a screen cone. The height of the cylinder is 24 inches, the diameter 18 inches, and the cone is 22 inches high and 18 inches diameter at the base.
Page 59 - The Dairy Division of the Bureau of Animal Industry, United States Department of Agriculture, has...
Page 47 - Conical hoop flytrap ; side view. A., Hoops formIng frame at bottom. B, Hoops forming frame at top. C, Top of trap made of barrel head. D, Strips around door. E, Door frame. F, Screen on door, a, Buttons holding door.
Page 4 - As these substances are dissolved the structure is broken down until the wood reaches the condition commonly known as rotten.
Page 145 - getting into" articles of food, particularly sugars, sirups, and other sweets. Having once gained access to stores of this sort, the news of the discovery is at once conveyed to the colony, and in an incredibly short time the premises are swarming with these unwelcome visitors. In habits and life history these ants are all much alike, and, in common with other social insects, present that most complex and interesting phase of communal life, with its accompanying division of labor and diversity of...
Page 212 - In order to prevent decay it is necessary to deprive the fungus of one or more of these requirements. It is out of the question in ordinary situations to deprive it of air and warmth, and, though moisture can sometimes be eliminated to a certain extent, this cannot be done when wood is exposed to the weather.

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