15 



person can easily lower the loaded cage by taking a hitch around a post, 

 and it may be raised, as shown in illustrations, either with engine or 

 with horses. 



MATERIALS FOR SMALL PLANT. 



Following are the illustrations (figs. 1-5) and list of materials for 

 the smaller plant, the tank of which may be filled with dip made as 

 per preceding formula for about $7.50. The drawings from which 

 the illustrations were made and the list of materials were furnished 

 by Dr. Robert H. Treacy. Sliding or roller gates are used, hung on 

 the ends of the alley or chute, at both the entrance and exit of the 



FIG. 1. Dipping plant with cage and derrick. Derrick 16 ft. high above ground. Derrick posts 4 ft. 

 in ground, 6 by 6 in. by 20 ft. long. Braces 4 by 4 in. by 10 ft. long; 2 double-leaf 6-in. blocks at top 

 of derrick, and 1-leaf 5-in. pulley at top of derrick under crosshead; 100 feet of 1-in. rope. 



cage. This is thought to be a decided improvement over having the 

 gates hung by hinges at either end of the cage. Barn-door rollers 

 may be used. The rope from the hoist works over a drum, with a 

 brake, and may be drawn by horses or a stationary engine, so the 

 cage can be lowered by the same man who operates the front gate, as 

 shown in the diagram. 



Entrance pen and chute. 



65 plank 2 inches x 6 inches x 16 feet. 

 28 posts. 



18 braces 444 

 152 



