102 



K.-XNS.^S UNlVKR.snV oUAK'll'.RLV. 



one measurement, the velocities being laid off as ordinates and 

 the number of strokes as abscisses. 



The quantity raised per stroke was found by pumping into a 

 vessel for a time, counting the strokes in that time, and measuring 

 the number of quarts pumped. The number of quarts divided by 

 the number of strokes gave the quarts per stroke. The lift was 

 measured with a tape line. The quantity per stroke multiplied by 

 its weight and by the lift gave the number of ft. -lbs. per stroke, 



iom. 



''O iS fio 2.0 2'0 



FifT. 7.-8 ft. steel miU. 18.:i ft.-lhs. per stroke. 



and from the number of strokes per minute the work per minute 

 was found. 



The airmeter was compared with the Kansas University signal 

 service anemometer and found to give readings a little less than 

 that instrument for ordinary pumping velocities. 



In Table II are given the dimensions of fans, their angle with 

 axis, number of fans, lift, etc., of some of the mills tested. 



Examining any of the figures it is seen that the distance traveled 



TABLE II. 



by the wind in 58 seconds, for any assumed number of strokes of 

 the pump, varies somewhat; this we would expect on account of 

 the sudden change in the velocity, so that a single measurement 



