386 



Journal of Agricultural Research 



Vol. IV, No. s 



0)0) O) 0)0^0)0^0)0) 0)0) ^ Cb Qo 



I 

 I 



M' 



>7^ -hrg 



82 



80 

 76 



76 



7^ 

 7^ 

 70 



ea 



66 

 6^ 



6a 



60 



Fig. 3.— Diagram for plotting curves by means of which the percentage of accuracy of the tensile strength 

 of wool when comparing two sets of observations may be exactly calculated. 



