iv.] SCHEMES OF DISTRIBUTION AND OF FREQUENCY. 47 



from the 1 8 Schemes, and find it is easily understood 

 and much used at my laboratory. 



Application of Schemes to Inexact Measures. — Schemes 

 of Distribution may be constructed from observations 

 that are barely exact enough to deserve to be called 

 measures. 



I will illustrate the method of doing so by marshalling 

 the data contained in a singularly interesting little 

 memoir written by Sir James Paget, into the form of 

 such a Scheme. The memoir is published in vol. v. of St. 

 Bartholomew's Hospital Reports, and is entitled " What 

 Becomes of Medical Students." He traced with great 

 painstaking the career of no less than 1,000 pupils who 

 had attended his classes at that Hospital during various 

 periods and up to a date 15 years previous to that at 

 which his memoir was written. He thus did for St. 

 Bartholomew's Hospital what has never yet been done, 

 so far as I am aware, for any University or Public . 

 School, whose historians count the successes and are 

 silent as to the failures, giving to inquirers no adequate 

 data for ascertaining the real value of those institutions 

 in English Education. Sir J. Paget divides the successes 

 of his pupils in their profession into five grades, all of 

 which he carefully defines ; they are distinguished ; 

 considerable ; moderate ; very limited success ; and 

 failures. Several of the students had left the profes- 

 sion either before or after taking their degrees, usually 

 owing to their unfitness to succeed, so after analysing 

 the accounts of them given in the memoir, I drafted 



