DISEASES OF CATTLE 383 



furnace is made of stone and should be 26 inches wide inside and 8 

 feet long. On top a cooking vat is placed, made of 14-inch plank 

 on the sides and a galvanized iron bottom 30 inches wide. The 

 cooking vat is 8 feet long by 14 inches high and 30 inches wide. The 

 radiator is connected with the furnace by a 6-inch pipe. Heat circu- 

 lation is established by means of a stack leading out and up from 

 near the farther end of the radiator. Galvanized stovepipe may be 

 used for the stack. The cage is made of the usual width 3 feet 

 6 inches wide outside and the tank 8 inches wider than when steam 

 heat is used, so that space may be allowed for the radiator. The 

 radiator must be protected by guides or standards guides in the 

 middle or, preferably, standards in the corners of the tank. 



LARGE DIPPING PLANT WITH SWIMMING TANK. 



The following suggestions are for the construction of a 

 swimming tank where large numbers of cattle iare to be dipped. 

 These are in accordance with drawings and notes received from Dr. 

 Louis A. Klein, inspector, Fort Worth, Tex., through the courtesy of 

 Mr. K. Roby, engineer of the Fort Worth Stock Yards Company, 

 and Dr. R. H. Treacy, inspector, Bismarck, N. Dak. 



Suggestions as to Labor Required. Excavate for the vat to 

 the proper depth ; level the bottom of the pit for the sills of the vat. 

 After the vat is completed and the outside has been coated with coal 

 tar, fill in around the vat, using the surplus earth to grade the sides 

 of the vat a little above the natural grade, sloping slightly from the 

 vat. Dig all holes required for the gate and fence posts. 



Carpenter Work. All work should be done in a skillful and 

 workmanlike manner; the framework of the vat to be bolted and 

 spiked together ; the plank of sides, ends, and bottom of the vat and 

 dripping floor to have edges beveled for the calking as per detail, 

 well driven together and well spiked with 20d. wire nails, using 40d. 

 nails on the 3-inch plank. Calk all seams with oakum, well driven 

 in with a calking iron, and pitched. The exit, or inclined end, of 

 the vat to have a 3-inch bottom plank ; all other planks of the vat and 

 dipping floor to be 2 inches thick. Sides of vat to be braced with 

 anchor braces extending back 6 feet from each upright as in smaller 

 swimming tank. The exit end of vat and dripping floor to be cleated 

 with 1^x3 inch strips, well nailed to floor and bottom, or with 4 

 inch x 4 inch cut diagonal. 



Gates and Fence. The gate post should be set 4 feet in the 

 ground and the fence post 3 feet 6 inches. Set all posts plumb and 

 to a line ; well and thoroughly tamp the earth around the posts. The 

 bottom of all posts should be coated with coal tar before being set. 

 Gate posts, 8x8 inches, with 6x8 inch tie framed and drift-bolted to 

 the posts. Fence posts, 6x6 inches. The gates should be bolted and 

 spiked together and braced. Hang with %x3x36 inch strap eye-and- 

 bolt hinges. 



POISONS AND POISONING. 



To clearly define the meaning of the word poison would be 

 somewhat difficult. (Even in law the word has never been defined, 

 and when a definition is attempted we are apt to include either too 



