2/0 



MEMORIES OF MY LIFE 



those measured at the above Exhibition about 1 70 

 per cent, were weaker and 30 per cent, stronger. 



This little table contains excellent material for 

 comparing the powers of the two sexes. 



i 



From Afeasurements made at the Anthropometric Laboratory in 

 the Internationa/ Health Exhibition of 1884. 



One of my many inquiries related to what I called 

 " Number Forms " ; it originated in this way. Mr. 

 George Bidder, Q.C., son of the engineer who in 

 his youth was the famous "calculating boy" (1806- 

 1878), and who inherited and transmitted much of 

 his father's remarkable powers, wrote in a postscript 

 of a letter to me in response to other inquiries, that 

 he himself habitually saw numbers in his mind's eye, 



1 The word " about " is a slight reservation due to each class man, 

 being one-half place short of his nominal class-place. In a class of ioo, 

 the topmost occupies the post of h, and the lowest that of 99^. There 

 are 101 divisions or "rungs" from o to ioo inclusive, but only 100 

 persons. The existence of this half place may be neglected by the 

 ordinary reader, though an expert would lay stress upon it. 



