828 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



Table 378. — Intelligence and occupation. Percentage distribution of letter grades of occupational groups in study by 



Surgeon General's Office. Based on same data as table 377, q. v. 



GROUP A (250- ). 



2f 

 3 



6g 



61 



7g 



8g 



10g 



12g 



13 



14p 



15b 



1711 



ISr 



18s 



22a 



23t 



24g 



25s 



27h 



27t 



27 tr 



31t 



32t 



38b 



38g 



38r 



39 



40b 



40c 



41 



44b 



45 



Occupation. 



Farmer 



Laborer 



General machinist 



Lathe hand 



General blacksmith 



Generalcarpenter 



General electrician 



General miner 



Painter 



Plumber 



Brakeman 



Locomotive fireman 



Receiver and shipper 



Stock keeper 



Auto chauffeur 



Heavy truck driver 



General auto repairman 



Stationary gas engineman 



Horse hostler 



Teamster 



Horse trainer 



Telegrapher 



Telegraph and telephone lineman. 



Bookkeeper 



General clerk 



Railroad clerk 



Stenographer and typist 



Baker. 



Cook 



Butcher 



Band musician 



Barber 



Letter grades. 



1.9 



.62 



3.0 



3.2 



1.7 



1.9 



9.8 



.9 



1.5 



2.6 



2.4 



1.9 



8.5 



5.6 



4.1 



2.6 



2.8 



2.0 



2.1 



1.3 



1.8 



7.3 



3.8 



18.1 



15.3 



12.0 



28.1 



2.4 



.7 



1.1 



B. 



5.2 



3.5 



9.3 



10.0 



8.2 



7.6 



18.2 



4.1 



7.7 



9.2 



8.8 



7.1 



17.6 



19.2 



10.2 



8.3 



10.6 



8.5 



4.5 



4.3 



5.2 



20.3 



8.9 



28.6 



25.0 



24.7 



34.3 



8.7 



7.3 



8.3 



18.5 



6.1 



C+. 



12.6 

 10.7 

 21.2 

 18.1 

 18.8 

 20.7 

 27.7 

 11.7 

 18.2 

 23.7 

 22.5 

 21.1 

 25.9 

 28.6 

 22.5 

 18.2 

 25.1 

 15.7 

 13.9 

 12.5 

 18.4 

 32.2 

 20.8 

 29.9 

 33.6 

 31.5 

 27.1 

 17.7 

 17.9 

 21.6 

 2S. 6 

 14.9 



26.4 

 24.2 

 29.2 

 32.3 

 31.3 

 31.9 

 28.4 

 26.7 

 33.0 

 31.9 

 32.0 

 36.4 

 29.1 

 29.6 

 31.3 

 32.6 

 31.7 

 30.0 

 27.0 

 27.9 

 34.7 

 29.1 

 33.9 

 17.9 

 19.7 

 23.7 

 8.7 

 29.5 

 29.0 

 31.8 

 26.3 

 26.3 



26.8 

 25.1 

 22.7 

 18.4 

 20.5 

 24.1 

 10.4 

 26.4 

 22.5 

 20.4 

 22.5 

 21.5 

 14.4 

 12.1 

 21.0 

 24.2 

 21.2 

 30.7 

 24.3 

 24.9 

 24.0 

 10.0 

 21.7 

 4.4 

 5.2 

 6.8 

 1.7 

 22.4 

 22.1 

 22.8 

 12.3 

 26.5 



D. 



20.6 

 24.6 

 10.8 

 13.9 

 13.9 

 10.5 

 3.8 

 20.3 

 12.2 

 9.6 

 9.2 

 9.0 

 3.5 

 3.6 

 8.5 

 11.0 

 6.7 

 10.2 

 19.4 



13.7 

 16.8 

 11.3 

 4.5 



18.8 



D-. 



6.4 

 11.4 

 4.1 

 4.2 

 5.4 

 3.3 

 1.6 

 9.7 

 4.8 

 2.6 

 7.5 

 3.0 

 .8 

 1.2 

 2.3 

 3.1 

 1.9 

 2.7 



5.5 



3.1 

 1.0 



Per 

 cent 

 beta. 



25.6 



32.4 



14.9 



22.4 



21.6 



17.0 



3.4 



30.2 



18.0 



17.0 



11.3 



14.3 



3.7 



3.4 



11.1 



12.9 



8.5 



19.5 



29.2 



26.04 



18.5 



2.3 



12.5 



1.8 



1.5 



1.6 



.6 



22.4, 



28.5 



16.7 



6.2 



27.1 



GROUP B (140-250). 



GROUP C (80-140). 



6cm 

 6to 

 15c 

 18c 

 34 

 40ca 

 82 



General mechanic 



Tool and gauge maker 



Railroad conductor 



Stock checker 



Photographer 



Caterer 



Detective and policeman. 



1.3 



6.5 

 10.6 

 2.8 



14.5 

 12.6 

 10.9 

 11.1 

 13.8 

 9.3 

 9.3 



24.6 

 19.0 

 20.6 

 25.0 

 29.8 

 13.9 

 29.9 



28.3 

 38.0 

 39.1 

 29.6 

 24.5 

 25.9 

 33.6 



16.7 

 20.2 

 19.6 

 21.3 

 14.9 

 20.4 

 16.8 



11.6 

 5.1 

 8.7 

 4.6 

 6.4 



23.1 

 5.6 



4.3 



1.1 



1.8 



4.6 

 3.7 



15.9 



10.1 



7.6 



6.5 



11.7 



28.7 



4.8 



