Table 5-7. Number of academic scientists and engineers, 

 by primary work activity, 1965-74 



January 



Primary work activity 1965 1967 1969 1971 1973 1974 



Total 178,904 212,855 246,183 273,775 282,631 288,085 



Teaching 121,991 



Research and development 40,003 



Other activities 16,910 



SOURCE: National Science Foundation. Manpower Resources lor Scienlific Activities at Universities and Colleges. January 1974, Detailed Statistical 

 Tables. (NSF 75-300-A). and earlier volumes. 



Table 5-8. Tenured faculty as a percent 



of all faculty in doctorate-level science 



and engineering departments, by selected 



fields, 1974 



Percent with 



Field tenure 



All science and 



engineering fields 70 



Chemical engineering 81 



Physics 78 



Electrical engineering 77 



Botany 77 



Chemistry 77 



Geology 75 



Zoology 71 



Biology 69 



Economics 67 



Mathematics 67 



Biochemistry 66 



Microbiology 65 



Psychology 63 



Sociology 60 



Physiology 59 



SOURCE National Science Foundation. Young and Senior Science and 

 Engineering Faculty. 1974: Support. Research Participation, and Tenure (NSF 

 75-301). 



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