32 Journal of the Mitchell ISociety [September 



factnre of salvarsan and in the United States is was called arsphe- 

 namin and neo-arsphenamin. 



The author reports a dark field study of six cases with primary- 

 lesions and one case with secondary lesions after the administration 

 of arsphenamin and neo-arsphenamin. Six of these cases showed an 

 absence of live spirochetes in the lesions 48 hours after the administra- 

 tion of the drug. One seemed more refractory to arsphenamin and 

 did not show complete sterility of the lesion for 8 days after the 

 administration of the drug. 



J. F. Dashiell — Measurement of Intelligence in Different Social 



Classes. 



After preliminary discussion of intelligence and its measurement, 

 and of the correlation of economic class differences with certain phys- 

 ical and mental traits, a brief experimental study was reported. In 

 continuation of a study made four years earlier by Chase and Car- 

 penter. Dashiell and Glenn made Binet intelligence examinations of 

 Chapel Hill children belonging to different social-economic groups. 

 The same results were found: a correlation between economic class 

 and intelligence level; the country, town, and faculty children show- 

 ing respectively low, medium, and high levels. To make sure that 

 previous conditions of literncy in the children's life played no part, 

 a series of motor performance tests was given the same subjects. 

 Results for the faculty group were still distinctly high, but the 

 country children noAv excelled the town children slightly. Thus, 

 the Chapel Hill school population api)ears divisible into two groups 

 on the basis of hereditary family stock, with a subdivision of one 

 of these on the basis of environmental opportunity. 



257th Meeting— April 11, 1922 



Archibald Henderson — Generalized Relativity and the Three Tests. 

 The Newton and Einstein cosmologies were compared in detail, 

 using the device of parallel columns. The author then outlined the 

 trend of Einstein's thought in reaching his epochal generalization, 

 and showed how the transition was made from the Restricted to the 

 Generalized Relativity. In especial, he described the practical mode 

 by which Einstein's theory was tested, and indicated the procedure 

 employed in making these tests. In particular he announced that 

 news he had just received from Paris that the third test. — the shift 



