156 MECHANICS. 



liarly adapted to raking stubble, its upright teeth pre- 

 venting the collection of portions of the soU with the 

 straw. 



All horse-rakes used on meadows are not only use- 

 ful by the immediate saving of labor, but sometimes 

 still more so by the expedition with which a crop of 

 well-dried hay may be rescued from an approaching 

 storm. 



MOWING AND REAPING MACHINES. 



The cutting part of all the best mowers and reapers 



Fig. 1 33. made at the present day 



^i^^^Ml^,^;^^;^ ^ consists of a serrated 



blade, as shown at a 



^ A A A _f\_J\_ (-^^■^- 133)' ^^i^^ P^««- 



I— —I _ gg through narrow slits 



in each of the fingers shown in 6, forming, when thus 

 united, the cutting apparatus, as exhibited in the an- 

 nexed figure of KetcJmm's Mowing-machine {Fig. 

 134). "When the machine is used, the motion of the 



Fig. 134. 



Ketchum's Mowing-machine. 



wheel on which the machine runs is multiplied by 

 means of the cog-wheels, imparting quick vibrations 



