ex Department of Farm Mechanics. 



acter of spray from any nozzle at any pressure or range, was de- 

 vised by the writer and erected by two students doing special work. 

 A special arrangment of tanks has also been devised by the writer 

 and erected for accurately measuring the liquid supplied the noz- 

 zle under test and for delivering to it liquid at any desired con- 

 tant pressure up to 250 pounds per square inch. This machine 

 was exhibited in operation during Farmers' Week, some research 

 work was done on it by its erectors, and it was used by students in 

 the study of spray machinery. Nozzles of all styles and types have 

 been obtained from makers throughout the country and these will 

 be tested for efficiency under different conditions. It is hoped, how- 

 ever, that it will be possible to determine from further tests the 

 general laws governing the performance of each type of spray 

 nozzle 50 that it will be possible to predict from the design the 

 probable performance. The knowledge of such laws should prove 

 of value both to the makers and to the users of spray nozzles. 



For use in the study of problems of draft, a Gidding's self- 

 recording dynamometer has been purchased by special appropria- 

 tion and a more elaborate and more accurate one has been bor- 

 rowed from the U. S. Dept of Agriculture. No work has as yet 

 been done with either of these instruments. 



in. EXTENSION. 



Owing to the heavy demands of regular work on his time, the 

 writer was able to do very little extension work beyond replying 

 to the questions received by mail or through the Extension De- 

 partment. 



IV. recommendations. 



The needs of this Department were set forth somewhat at length 

 in the report for last year, and are here restated. That those 

 needs are more urgent now that they were last year is made clearly 

 evident by the great increase in the number of students desiring the 

 work. The Engineering Departments have from the first been 

 classed with the most important of the departments of the college. 

 I respectfully and urgently request that means for their proper 

 development be soon provided. 



More than a year ago this Department relinquished its claim to 

 the larger of its two rooms, which has since been converted into a 

 laboratory for the Department of Soils whose old quarters are 

 now occupied by the Department of Plant Physiology. In addi- 

 tion, the latter department has received a conditional promise that 



