THE TABLES: EXPLANATORY 19 



CLASS B 



Professional classes (doctors, lawyers, etc.). 



Business men. 



Railwaymen. 



High-grade mechanics. 



Children in upper class schools (may be in Class A depending 



on school). 

 Clerks, upper class. 



CLASS c 

 Tailors. 

 Shopkeepers. 

 Shoemakers. 

 Printers. 

 Potters. 



Clerks, lower class. 

 Painters. 



Elementary school children. 

 Factory children. 



VARIATIONS FROM THE NORMAL IN PHYSICAL FITNESS. 

 As a result of the examination of a large number of 

 apparently healthy people who, from mode of life or 

 occupation, should belong to Classes A, B, or C, respec- 

 tively, it can safely be stated that if a person is found 

 to have as much as 10 per cent, less vital capacity than 

 is normal for his class, it is probable that he is suffering 

 from some health-depressing condition, and if he is as 

 much as 15 per cent, below the normal limit it is prac- 

 tically certain that he is abnormal in this respect. 



VITAL CAPACITY IN DISEASE. In studying the changes 

 in vital capacity taking place during various diseases, 

 for instance pulmonary tuberculosis, the Tables should 

 be used in exactly the same manner as has been indi- 

 cated above. 



First, find out from the trunk-length and chest-meas- 

 urement what the patient's normal weight should be, 



