KANSAS UNIVKKsriA' ( Jl'ARTKRLV- 



From ( 19; 



^^o^ 32X7"X-oo7oBX25X-ii -_^^ ft. 



I of one 



222x32. 2X(3/^)-^ 

 per cent of useful work. 



From (20) ,_^^\L3 = 2_2,XyVX-07(95o+i73)^2o.5o ft.-lbs. 



The loss li., is small except when h is large or the diameter of 

 the pipe is small. The third loss is much greater than either or 

 both the other losses. 



The Power Found l)y Measurement. 



The quantities to be measured are the velocity of the wind, or 

 distance traveled by it in time t, the quantity of water raised in 

 that time and the height to which it is raised. 



The velocity of the wind was measured with an air meter, Fig. 

 I, having a fan wheel 23/^ inches in diameter, a minute glass and a 

 disconnector. The motion of th»' fan wheel is recorded on six 



/o j^ ,no .r'-r 3^0 



Viii. +.— Sfi. sicfl mill. ;sft.-ll)s. i)fi' stroke. 



dials. It will record any wind movement from one foot up to 1893 

 miles. The minute glass was found to have an index error of two 

 seconds; that is, the sand runs through the glass in 58 seconds 

 instead of 60. The meter was placed on a vane so that the axis of 

 the fan wheel was always in the direction of the wind. The vane 

 was placed on the end of a board and held on the platform of the 

 mill in front of the wheel. In the case of mill No. 4, Fig. 4, th 



