20 THE MENDEL JOURNAL 



vouchsafed by a member of the family, the No. 4 

 in the F^ generation. The family is a well-to-do 

 Irish one. It is chiefly remarkable in the apparently 

 sporadic appearance of tuberculosis in the present 

 or Fi generation and in the manifestation of that 

 disease, as a rule, at between 19-20 years of age. 

 The family is one of such social position that it 

 excludes the factors of malnutrition and unhealthy 

 surroundings as an operative environment in the 

 causation of the disease. 



The Facts of the Pedigree. 

 P^ Generation. 

 No. 1. Retired Colonel. Death unknown. 

 „ 2. Died of senility at 80 years of age. 



„ 4. „ at childbirth. 



P Generation. 



All normal except No. 5, who died of cancer. 



Nos. 4 and 6 are sisters, and No. 2 is the sister of No. 3. 



Fi Generation. 



No. 1. Died at 18 years of age from rapid pulmonary 



consumption. 

 „ 2. Still alive. Has suffered from ulcerated throat. 

 „ 3. Died at 19 years of age from tuberculosis of 



stomach. 

 „ 4. Quite normal. 



„ 5. Quite normal, but has gout in one finger joint. 

 „ 6. Still alive, but had tuberculous neck glands 



extracted at 19 years of age. 



