270 



MEMORIES OF MY LIFE 



70 



those measured at the above Exhibition about 

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



This little table contains excellent material for 

 comparing the powers of the two sexes. 



From Measurements made at the Anthropometric Laboratory in 

 the International Health Exhibition 0/1884. 



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 100, 

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

 are 101 divisions or "rungs" from o to 100 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. 



