540 Agricultural Experiment Station, Ithaca, N. Y. 



Cassidy or Rogers apparatus. The Culver lifting device consisted 

 of a head-block which was raised by a lever, and it connected with 

 two columns or runs of notched strips on either side of the stack. 

 These vertical strips or bars, with the stationary notches, alternately 

 recede into the recesses of the wall, to allow of the lifting of the 

 trays by one bar and the engaging or holding of them in place by 

 the other. The Culver head-block, which is shown at H C O, and 

 the lever at L in Fig. 105, was at the top of the stack. Now, the 

 Cassidy lifter worked from the bottom, raising the trays by means 



112. — Feeding door of stack. 



of a chain winding on an iron bar which was turned by a crank out- 

 side the stack. But instead of resting the trays on stationary cogs 

 or notches, as the Culver device did, the Cassidy apparatus employed 

 movable dogs. In 1881, L. R. Rogers obtained the consent of the 

 interested parties, as he informs me, and combined the two machines, 

 using the head-block of the Culver and the movable dogs of the 

 Cassidy. This type of lifting device is the most popular apparatus 

 now in use in Wayne county and adjoining regions, largely because 

 it is readily adapted to any size or height of tower, and is simple 

 and direct in operation. 



