The taxonomic value of the microscopic structure of the stigmal plates in the tick genus dermacentor / by Ch. Wardell Stiles.

  • Stiles, Ch. Wardell.
Date:
1910
Catalogue details

Licence: In copyright

Credit: The taxonomic value of the microscopic structure of the stigmal plates in the tick genus dermacentor / by Ch. Wardell Stiles. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    CONSTRUCTION OF VATS. The specifications for such vats as will be found best adapted to use iii Montana are taken from Fanners1 Bulletin No. 378, already referred to, as follows: SPECIFICATIONS AND MATEBIAXS FOR A DIPPING VAT. A vat constructed according to the accompanying plans will hold 2,OSH gallons when filled to a depth of 5 feet. Excavation.—Excavate for the vat, as shown by the drawings | fig. .‘51, to the proper depth. Level the bottom of the pit for the sills. After the vat is com- pleted till In around It, using the surplus natural grade, and slope the surface away from the vat. Dig the holes required for all posts, etc. Carpenter work.—The drawings show the vat constructed according to two methods. One method is to make the sides of 4 by 4 inch posts spaced about 3 feet apart and lined with 2 by 8 inch dressed, sized, and bevel-edged plank, using 20-penny spikes to fasten them to the posts and braces. All the joints are to be calked with oakum, well driven in with a calking iron, and pitched. The floor of the vat and the inclines are to be made of 2-inch plank, with joints calked; the exit incline to have 2 by 4 inch cleats spiked to the plank flooring. The slide should have an angle of about 25° and should be covered with No. 10 galvanized iron. The other method is to build the sides of the vat of 2 by 4 inch posts and 2 by 4 inch braces spaced about 16 inches on centers. The 2 by 4 inch posts and braces are to be lined with l by 8 inch tongued-and-grooved flooring, blind nailed at every bearing with 10-penny nails. All the joints are to be laid in white-lead paste and the boards firmly driven up. Lumber.—The lumber used in the construction of the vat must be thoroughly dried and seasoned stock, free from large and loose knots, straight gralped, and free from sap. Gutters.—The gutters for the dripping pens should be made of sound stock, the bottom plank housed into the sides and ends, and the ends housed into the sides. All the joints are to be laid in white-lead paste and thoroughly nailed. Gutters are to have a 3-inch fall in 11 feet. BUI of materials for vat and draining pens. Vat : Sills, 8 pieces 4 by 4 inches by 10 feet long. Posts— 1 piece 4 by 4 inches by 10 feet long. 1 piece 4 by 4 inches by 14 feet long. 0 pieces 4 by 4 inches by 12 feet long. 5 pieces 4 by 4 inches by 10 feet long. Braces— 1 piece 4 by 4 inches by 10 feet long. 6 pieces 4 by 4 inches by 12 feet long. 1 piece 4 by 4 inches by 10 feet long. 1 piece 4 by 4 inches by 0 feet long. Guards— 2 pieces 2 by 8 inches by 18 feet long. 1 piece 2 by 8 inches by 16 feet long. 2 pieces 2 by 8 inches by 12 feet long. 1 piece 2 by 8 inches by 10 feet long.
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