Pamphlets on Forestry. Grazing, Том 8

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1918
 

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Стр. 23 - The secret of success is to work the; arsenic in fast enough to keep the solution very hot — nearly but not quite at the boiling point. The result should be a clear solution, except for dirt. If the liquid persistently remains muddy or milky, it may be because the operation has been conducted so fast that much water has been boiled out and sodium arsenite is beginning to crystallize, so add another gallon of water and stir. If the solution does not then clear up, the caustic soda must have been...
Стр. 5 - ... as a consequence of drawing a large supply of blood. When fully engorged she drops to the ground and at once, especially if the weather is warm, begins to search for a hiding place on moist earth beneath leaves or any other litter which may serve as a protection from the sun and numerous enemies or shield her from unfavorable conditions. The female tick may be devoured by birds, or destroyed by ants, or may perish as the result of...
Стр. 4 - An incidental though important advantage of stock raising and dairying will be found in the distribution of the fanner's income throughout the year, enabling him to live on a cash basis. Thus the benefits that will accrue to southern agriculture through exterminating the cattle tick will be far-reaching. LIFE HISTORY OF THE TICK. To carry out methods of eradication successfully it is necessary to know the life history of the tick and the influence of temperature, moisture, and other climatic conditions...
Стр. 5 - The eggs are small, ellipticalshaped bodies, at first of a light amber color, later changing to a dark brown, and are about one-fiftieth of an inch in length. As the eggs are laid they are coated with a sticky secretion which causes them to adhere in clusters and no doubt serves the purpose of keeping them from drying out. During egg laying the mother tick gradually shrinks in size and finally is reduced to about one-third or one-fourth her original size.
Стр. 19 - Lime-sulphur dip, other than proprietary brands thereof, made in the proportion of 12 pounds of unslaked lime (or 16 pounds of commercial hydrated lime, not airslaked lime) and 24 pounds of flowers of sulphur or sulphur flour to 100 gallons of water; or a specifically permitted proprietary brand of limesulphur dip.
Стр. 18 - It is much longer during the winter than during the summer. The time required, beginning at various times of the year, is given in the following table : Time required for all ticks to drop from cattle placed on tick-free land. Freeing cattle of ticks by rotation on tick-free land. — The plan of freeing cattle of ticks by rotating them from one lot or field to another is as follows : Beginning at any time of the year from...
Стр. 12 - Forms and fences.—The wooden forms should be constructed of 1-inch boards and 2 by 4 inch braces, the boards being nailed to the outside face of the braces, as shown in the drawings. The sides and end walls should be built 8 inches higher than the surface of the ground, which should be level.
Стр. 41 - ... between the fingers, then dip the fingers under water and try to rub off the tar. It should leave the fingers perfectly clean after a little rubbing with water. If an oily coating remains, more caustic-soda solution is needed. Such an extra addition of caustic soda will be required only in case of a very lowgrade chemical or a very highly acid tar. The tar stock should be kept in closed containers, such as a pail with a friction top.
Стр. 122 - Japanese Commission, 1914. Report on the Results Obtained by the Special Committee for Investigation of Infectious Anemia of the Horse.
Стр. 10 - ... pest may be attacked in two locations, namely, on the pasture and on the cattle. In freeing pastures the method followed may be either a direct or an indirect one. The former consists in excluding all cattle, horses, and mules from pastures until all the ticks have died from starvation. The latter consists in permitting the cattle and other animals to continue on the infested pasture and treating them at regular intervals with agents destructive to ticks and thus preventing engorged females from...

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