1Y2 



TRANSACTIONS OF THE 



MACHINERY No. 7. 



GRIST AND SAW MILLS, 



Harrison's Flour and Graiyi Mills. 



Edward Harrison, New Haven, Conn. 



These mills are constructed wholly of stone and metal, in a 

 strong and compact manner. The frames are made of cast-iron 

 throughout, including the hopper, which admits of their being 

 continually used with a strong power without yielding. 



The cut is a representation of a geared mill. The gear wheels 

 are made (jf iron, and run as well as it is possible to make them. 

 TIr' belt runs on a pulley, upon a horizontal shaft, which, by bevil 

 gear, gives motion to the spindle. 



The gears should be kept well greased, or, by constant friction, 

 they will rapidly wear away and need the substitution of new 

 ones. 



It is much easier to attach the power to these mills from com- 

 mon horse powers or horizontal shafting; and they are provided 

 with gears fur that purpose. Pulley mills (as exemplified in the 



