In conclusion, it may be suggested that the free exchange of drilling-time 

 logs would prove of considerable mutual benefit to geologists in much the same 

 way that the interchange of electric and radioactivity logs is at the present time. 

 Many companies publish catalogs of logs available for distribution. If drilling- 

 time logs were added to these lists, they would benefit geologists whose respons- 

 ibility it is to interpret properly the records made in the drilling of a test for 

 oil or gas. 



Reprinted from Subsurface Geologic Methods, 1951, p. 455-475. 



387 



