Table 5-9. Doctoral scientists and engineers, by age and 

 type of employer, 1973 



Age 



Total 



Under 30 



30-34 



35-39 



40-44 



45-49 



50-54 



55-59 



60-64 



65 or over 



No report 



' Less than 5 percent 



NOTE Detail may not add to totals because of rounding 



SOURCE National Science Foundation, Characteristics of Doctoral Scienttsts and Engineers in ttie United States, 1973 {NSF 75-312). 



Table 5-10. Postdoctorals and research assistants in science 



and engineering departments at doctorate-granting institutions, 



1967-74 



(Index: 1967 = 100) 



NOTE The indices for 1967-71 are estimates based on applications submitted to NSF for its departmental traineeship program Indices after 1971 were 

 collected by the "Survey of Graduate Science Student Support and Postdoctorals" for matched departments 



SOURCE National Science Foundation, special tabulations. 



Table 5-11. Doctoral scientists and engineers by type of R&D 

 activities and by field, 1973 



Activity 



Total 



Research 



Development 



Management of R&D 



Total 



Research 



Development 



Management of R&D 



Physical Mathematical Life Social 



Total scientists Engineers scientists scientists scientists 



NOTE: Detail may not add to totals because of rounding 



SOURCE National Science Foundation, Characteristics of Doctoral Scientists and Engineers in the United States. 1973 (NSF 75-312). 



233 



