ADVISORY COMMI'fTEE ON GEOPHYSICS 



49 



I do not think that a man competent to investigate great prob- 

 lems should be asked to serve for less than $3,000 a year. Men 

 who have earned large reputations must receive higher salaries, 

 rising, say, to $6,000. The director might be worth $7,000. It is 

 my understanding that some system of retiring pay is to be provided 

 in the Carnegie Institution. I would suggest that if a fixed age of 

 retirement is adopted, provision be made for exceptions in cases of 

 unusual vigor, and, further, that retired officers should be expected 

 to contribute to the publications of the Institution such material as 

 they may find practicable without undue exertion. 



5. General feahwes of plant. — A geophysical laboratory to be sat- 

 isfactory must be built upon a rock foundation in a locality as far 

 removed as practicable from all mechanical and electrical dis- 

 turbances (1,000 feet at least), and must be secure against the 

 encroachment of disturbing conditions for the future. The success 

 of secular experiments, the stability of instruments and the 

 accuracy of electrical methods of measurement demand such 

 conditions. 



A satisfactory laboratory cannot be built in a brief period, and I 

 have therefore given estimates for the distribution of the expendi- 

 tures for plant, salaried and maintenance over a term of four years, 

 supposing the fourth year to represent the permanent annual expen- 

 diture. These estimates would, of course, require careful revision 

 by an architect and others, but may serve a preliminary purpose. 



In closing what I can at present contribute to the subject, I have 

 outlined some features of such an administration as experience 

 seems to show should be adopted for the geophysical laboratory. 



6. Scientific staff. 



YEAR. 



First. 



Second . 



PERMANENT STAFF. 



Director $6,000-8,000 



Mathematician 3,000-6,000 



Physicist 5,000-6,000 



Chemist 3,000-6,000 



Director 6,000-8,000 



Mathematician 3,000-6,000 



Physicist 3,000-6,000 



Chemist 3,000-6,000 



TEMPORARY STAFF. 



Computer ...... $1 ,000-1 ,500 



Computor i ,000-1 ,500 



Ass't Phys 1,000-1,800 



Ass't Chem i ,000-1 ,800 



