Code 5401-BEO/bah 

 23 July 1958 



MEMORANDUM 



Subj: Second progress report of the Committee on Instrumentation 



proposed during the final phases of the work of the Committee after 

 it has exhausted other available sources of information. Possibly one 

 of the first visits proposed will be to the Lamont Geological Observatory 

 to investigate a geophysical data recording system which they report 

 as being developed. 



10. Enclosure (3) summarizes the status of Hydrographic Office magnetic, 

 gravity, and depth measurements and the nature of the instruments used. 

 The Committee plans to examine the instrumentation problems associ- 

 ated with these measurements during the next phase of its work. 



11. Enclosure (4) summarizes the responses received to date to a 

 questionnaire on the adequacy of present field instruments. Not all 

 of the questionnaires sent to the Divisions have been returned as yet. 



BOYD E. OLSON 

 Chairman 



B-4 



