546 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. [vol. xv, no. 2.] 



Table 210. — Devens, Lee, Taylor, combined — Average per cent making each grade. 



Table 211. — Nashville, Syracuse, Indiana, and Mosquito Fleet — Trial experiment. 



Table 212. — Summary. 



i Known to be poor groups. 



It would hardly be safe to assert the existence of considerable differences between forms 

 on the basis of the data. It appears, however, that forms B and E are more difficult than the 

 others, and that form A is easiest; but when it is remembered that in one of the four groups 

 furnishing the final table the form E group was characterized on other grounds as "poor," 

 and that in another case the same is said of a form B group, the figures seem inconclusive. 

 The differences in the character of the groups examined all but obscure the differences due to 

 relative difficulty of forms. 



