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DAIRY LABORATORY GUIDE 



Elevator for carrying boxes, etc., to attic. 

 The milk can elevator invented by 0. B. Schier, 

 of Baltimore, consists of two endless chains running 



FIG. 50. Milk Can Elevator. Upper Floor 



over sprocket wheels, connected by a single shaft at 

 the lower end in such a way that both chains must 

 travel at the same speed. Between the chains are 

 suspended on swivel links a number of swinging 



