214 



The Journal of Heredity 



which the student j?ody pertains. The 

 factor of coeducation ai)])ears to hav^e 

 produced no sjjccific influence, nor is 

 there clear evidence that the college 

 environment has materially affected the 



results. The j^roblem is to a consider- 

 able dej^ree one of inherent character of 

 the women, in which the college has 

 served chiefly as a selective aj^ent for a 

 specific type. 



The Problem of Handedness in Education 



Approaching: the ])roblem of lefl- 

 handedness from the ]jsycholo<^ical side, 

 Prof. W. F. Jones, of the University of 

 South Dakota, described his researches 

 at the last meeting of the American 

 Psycholojj;ical Association. 



Out of 10,000 persons 417 arc l)orn 

 left handed, 9,853 are born right handed ; 

 4% of the race are lefthanded, 96% are 

 right handed. Out of 417 bom left- 

 handers, 323 shift to the right hand. 

 Seventy-seven j^er cent of born left- 

 handers adoi)t the minor arm. Out of 

 417 born left handed, 4 are shiftedby acci- 

 dent, 1% of all lefthanders; 3 19 are shifted 

 by purposive interference ; 94 are allowed 

 to use the major arm. Out of 9,583 

 born righthanders 96 are shifted to 

 the left hand, 1% (accident). Four 

 hundred and nineteen ])ersf)ns (323 ])lus 



96) out of 10,000 ado])l the wrong arm, 

 that is, one i)erson out of twenty-five 

 is using the minor arm. 



Conclusion from skill tests of the 

 three tyj^es of handedness are: (1) The 

 pure lefthander reveals no less skill than 

 the inire righthander; (2) the shiftover 

 is regularly deficient in hand and arm 

 skill ; though the average skill of his two 

 hands is equal to the average skill of the 

 two hands of the right or lefthander, he 

 has two minor hands and arms rather 

 than one dextral and one minor; (3) it 

 is possible to shift back to the major arm 

 if the shiftover does not show a muscle 

 swell of minor arm exceeding that of the 

 major (born) arm, and if the shiftover 

 is below adolescence the backshift 

 should be made. His work agrees in 

 general with that of other students. 



The Offspring of Marriages of the Deaf 



GRAPHICAL STUDIES OF MARRIAGES 

 OF THE DEAF IN AMERICA, by Alexander 

 Graham Bell, with an introduetion Ijy Fred 

 DcLand. Pp. 300. Washington, D. C: The 

 Volta Bureau, 1917. 



In his book, "Marriages of the Deaf 

 in America," puljlished in 1898, E. A. 

 Fay recorded data about 2,644 marri- 

 ages where children had been jjroduced, 

 and where one or more of the jjarents 

 was deaf. Dr. Bell has made a gra])hical 

 representation of each of these cases, 

 and pedigree charts of the 300 cases in 



which there were tleaf offspring. The 

 dysgenic effect of the marriage o" deaf 

 l^ersons can therefore be seen at a 

 glance. It is found that the average 

 number of children is 3.48, and that 

 56% of them are deaf. This, however, 

 refers only to marriages which resulted 

 in at least one deaf child. Most of the 

 marriages, in which at least one of the 

 l)arents was deaf, did not result in deaf 

 offspring. Of the total numln^r of 

 children (6,782) from all marriages, 

 only 588 or 8.6^'^' were deaf. 



A Horseman's Views on Eugenics 



"The Right To Ik- Well Born" is the 

 title of a book lately published by W. 

 E. D. Stokes, j)resident of the Patchen 

 Wilkes Stock P""arm, Lexington, Ky. 

 Mr. Stokes is one of the best-known 

 breeders of thoroughbred horses in the 

 United States, and believes that manv 



of the methods which have been suc- 

 cessful in that industry could be profit- 

 ably applied to the human race. His 

 book is one of the most original and 

 thought-provoking of recent contribu- 

 tions to the literature of eugenics and 

 should ha\e a stimulating influence. 



