60 HOUSEHOLD AND HEALTH PROBLEMS 



Dr. L. H. Gulick, an eminent authority, says that 90% of 

 these minor ailments could be prevented by careful atten- 

 tion. According to the census of 1910 there were 29,000,000 

 workers in the United States. Estimate the loss of the nation 

 due to carelessness, if each man could earn an average of 

 $1.25 per day. 



6. A large optical-goods factory in Germany reduced the 

 hours of its working day from 9^ hr. to 8 hr. The firm 



SANITARY WELL 



reported, after a careful record had been kept, that the out- 

 put of the factory per hour had been increased 16.2%. If 

 the daily output of each man working 9^ hr. per day was 

 $4.75 worth of goods for the market, what was the value of 

 the goods produced by the man working 8 hr. per day? By 

 the conservation of the employee's vitality and efficiency, 

 how much productive wealth was added to the output of 

 each man per day. 



