PERFECTING THE DETAILS. 199 



sieves have a pivoted hammer, Fig. 18, Page 56, and a 

 cord which readies from the hammer to C, passing over 

 two sash pulleys, Fig. 19, Page 58, on the way. This 

 cord can extend 100 or 500 ft., or more, for that matter, 

 to where the operator is. It may extend inside your 

 dwelling, say to the kitchen, where the cook can give it 

 a pull from time to time, or it may run to an office, 

 workshop or store, or be attached to strong clockwork 

 that is wound up to run all day, and, just as clocks are 

 made to strike the hours or half hours, so the pulls on 

 the hammer- wire connected with your feed dropper may 

 be timed with equal precision. 



The tilt boxes for both brooder chicks and grown 

 fowls will need larger and stronger clockwork, such as 

 is attached to large orchestrions or music-producing 

 machines, or apparatus used in gas works, in hotels, fac- 

 tories or private dwellings, where the motive power is 

 very heavy weights. Better yet, the machinery govern- 

 ing the periodical pulls will be propelled by a steam 

 engine, electricity or water power, as progress demands ; 

 for the idea of feeding and tending fowls, and larger 

 species of domestic animals as well, by machinery, is 

 destined to be expanded indefinitely. 



To return to Fig. 18, of course the sticks to which 

 the sash pulleys are attached, and also the uprights, 

 must be immovable. Now, will the reader please turn 

 to Page 170, and imagine that the whole of the appara- 

 tus of Fig. 75 is placed under the sash pulleys, close to 

 the uprights in Fig. 18, Page 56, in such a position that 

 when the hammer is dropped it will strike, kerchug, 

 on the iron plate, li. To the board, a, attach the iron 

 pipe which supports such a row of sieves as is shown in 

 Fig. 106. The timber, n, is immovable, but Ji, m and #, 

 with the 100 or 200 ft. or more of pipe attached, are all 

 movable, and the coiled spring is compressible. Now, 

 when the hammer strikes, everything in Fig. 75 moves 



