358 IRRIGATION FARMING. 



in selecting one best adapted to his peculiar purpose. 

 Of side-vane governor mills, the Corcoran and Eclipse 

 are excellent examples. Of centrifugal kinds the Hal- 

 liday and Althouse are good examples, the latter being 

 folding and rudderless. The Buchanan is a good ex- 

 ample of a special form of wheel dependent for its 

 regulation on the tendency of the wheel to follow in 

 the direction it turns as the velocity and wind- pressure 

 increase. The Stover mill has a solid sail-wheel, with 

 vanes so regulated that it may be reefed, stopped, or 

 otherwise controlled to go slowly in heavy winds. The 

 Perkins mill has a solid wheel with metal vanes, and 

 an automatic rudder, which also a<5i:s as a self-regula- 

 tor. This, like many of the more recent mills with 

 metal vanes, as the Aermotor, Dempster, Currie, Gem, 

 Crane, and Ideal, is back-geared. The Aermotor is 

 one of the most popular of this class of modern wind- 

 mills with steel vanes. The lycffel windmill has metal 

 vanes made on a helical curve, and depends for regula- 

 tion on the fac5l that the center line of the wheel-shaft 

 stands off from and parallel to the plane of the rudder. 

 Others of the modern type of metal- vane wheels are 

 the Cyclone and the Woodmanse. The Advance is of 

 the automatic-regulating rudder type, and has both 

 steering vane and governing rudder. The Carlyle is a 

 special type, having a rudder arranged to reef the sail 

 in storms, and so attached by an adjustable cam as to 

 cause the center of gravity of the rudder to rise as it 

 falls toward the wheel. The Dempster also has a vane- 

 less wheel for the use of large ranchmen in the open 

 country. 



Erecting Windmills. — One thing of importance 



