TUBERCULOSIS AS AN ECONOMIC AND SOCIOLOGIC FACTOR 1 89 



find employment. No one who was not naturally of good bodily 

 health would think of learning the trade of blacksmith. Having 

 in mind these precautions which are to be used in interpretation of 

 figures, it will be found of value to consult Table VI. 



Certain occupations with high death rates from tuberculosis are 

 of such nature that they are to be reckoned as ''dangerous trades." 

 Marble cutting, with its fine mineral dust, predisposes to the disease. 

 So also do printing and bookbinding with their confined work often 

 in ill- ventilated rooms. Table VII is prepared from figures in Noth- 

 nageVs Encyclopaedia of Practical Medicine to illustrate the mor- 

 taHty from tuberculosis in certain trades in the city of Berlin. The 

 figures are based on records of mutual benefit associations. 



TABLE VII 



Tuberculosis as a Cause of Death in Dangerous Trades in the City of Berlin 



A careful study of the mortality in different occupations for 

 England and Wales has been made by Newsholme. It is of special 

 interest to note that in certain occupations there has been no decrease 

 in death rate in recent years, whereas in the general population there 

 has been an important decrease. In Table VIII there is presented 



TABLE VIII 

 Proportional Mortality (Percentage of All Deaths) from Pulmonary Tuber- 

 culosis IN England and Wales According to Occupations {Newsholme) 



* This means that 83 per cent of all tin miners who died in the years named were victims of pulmonary 

 tuberculosis. 



