290 EXPERIMENT STATION RECORD. [Vol.41 



(liines are claimed to save the labor of 15 men and 6 teams in ordinary thrash- 

 ing. This machine is a decided advance over the Stewart bundle loader, as it 

 supplies the thrashing separator with the shocked grain much more economi- 

 cally." 



The object of the motor bundle truck is to gather up shock grain and deliver 

 it at the thrashing machine. " It is claimed that seven men with two of these 

 machines can do exactly the same work as a crew of 20 men and 10 teams 

 would accomplish in ordinery thrashing practice, thus saving the labor of 13 

 men and 10 teams daily. No horses whatever are required with this machine, 

 as it is a large motor truck which will hold about two tons of hay or bundles. 

 The bundles are loaded on the machine by a device on the front of the truck. 

 This loading mechanism is run by tlie motor of the truck but can be started 

 and stopped independent of it." 



When the stacker is used, the binding device is removed from the ordinary 

 harvester, and the grain elevator is extended and raised to a much greater 

 height to deliver the grain directly into the stacker. The stacker and harvester 

 are each drawn by two horses. The capacity is about 2,500 lbs. of mature 

 wheat or other grain as it comes direct from the elevator of the harvester. 

 It is stated that the grain in these stacks seems to cure much better than 

 when in shocks. " When this machine is used in place of the binder it elimi- 

 nates 90 per cent of the cost for twine, as but a small amount is used to tie 

 the stacks. It requires the same amount of labor to stack and tie the stacks 

 as to shock the grain behind the binder. This machine has the further advan- 

 tage that it removes the weed seed from the land, such as wild oats." It is 

 also claimed that the stacker saves practically all the grain lost by use of the 

 ordinary self-binder. 



A study of the factors g'overning the efficiency of distribution and rate of 

 discharge of spray nozzles, H. Ij. Crane {West Yirijiuia l^ta. Bui. 169 (liHD), 

 pp. 3-65, figs. 2-'f). — A rather extensive review of work by others bearing on 

 the subject Is given, and the results of a study of the capacity of different 

 types of nozzles and of their efficiency in distribution is reported. An attempt 

 was also made to determine, if possible, some of the principles of nozzle 

 construction which influence their rate of discharge and distribution. 



With reference to factors influencing the distribution of the spray, it was 

 found that increasing the size of the outlet orifice increased the angle of dis- 

 charge and widened the ring of spray, but so far as could be told by observa- 

 tion did not increase the size of tlie spray particles. High pressures gave 

 the better distribution, more perfect cones, and smallest particles. Up to a 

 certain point the angle of the discharge was increased and the width of 

 the ring decreased with the pressure, but the size of the spray particles 

 became smaller as the pressure was increased. The results indicate that 

 for each nozzle there is an optimum pressure at which it works best, and any 

 additional pressure results in partial loss of energy. As the depth of the 

 eddy chamber is increased the angle of discharge and the width of the ring is 

 decreased and the size of the spray particles is increased. The results seem 

 1o indicate that increasing the width of the eddy chamber increased the angle 

 of discharge and the width of the ring and also breaks up the sjiray particles. 

 The angle at which the supply holes in the directing disk were drilled exerted 

 a great influence on the angle of discharge, width of ring, and size of drops. 

 The smaller the angle of the supply holes the wider was the angle of discharge 

 and the width of the ring and the smaller the drops of spray. A central supply 

 hole in the directing disk changed the spray discharged from a hollow cone 

 to a solid cone, narrowed the angle of discharge, and in some cases increased 



