The author spent eleven months in the United States of America (September 1963 to July 1964) as an exchange visitor. He was engaged as party leader on a deep resistivity study of the earth's crust in Orogon and Washington States. The work was later extended to cover the northern part of California. A report was written for the Office of Naval Research and Cambridge Research Laboratory of the Airforce, who funded the work. This report was later combined with the work of the Bonneville Power Administration and submitted for publication to the Institute of Electrical and Electronic Engineers. The author later spent three months touring the United States and Canada visiting companies of interest to geophysics. This report covers the sections of this trip during which the author visited places and made inquiries on behalf of the Department. A total of 23 working days were involved. The companies visited are listed each with a short commentary while several geophysical methods and other subjects are examined in more detail and include information gathered on the private sections of the trip. Although all companies visited were helpful, they were reluctant to discuss the finer details of particular surveys.