64 ENGLISH MEN OF SCIENCE. [CHAP. 



Parkes, M.D., F.R.S., professor of hygiene to 

 the Army Medical School. 



Fourth generation. (See under Darwin.) 



STATISTICAL RESULTS. 



Let us now look at the near relations of the 

 scientific men from a purely statistical point 

 of view, combining those already quoted with 

 the rest, and calculate the proportion of them 

 who have -achieved distinction. It appears from 

 my returns, which are rather troublesome to 

 deal with, owing to incompleteness of informa- 

 tion, that 120 scientific men have certainly not 

 more than 250 brothers, 460 uncles, and 1,200 

 male cousins who reach adult life. They have 

 somewhat less than 120 fathers and 240 grand- 

 fathers, because the list contains brothers and 

 cousins. I will take two groups : (l) grand- 

 fathers and uncles, both paternal and maternal, 

 say about 660 persons; (2) brothers and male 

 cousins on both sides, 1,450 persons. On the 

 supposition, which is somewhat in excess of the 

 fact, that I am dealing with complete informa- 



