JOURNAL 
OF THE 
WASHINGTON ACADEMY OF SCIENCES. 
Vou. 13 Juty 19, 1923 No. 13 
GEOPHYSICS.—Some recent progress in tsostatic investigations.! 
Wiuu1Am Bowin, Chief, Division of Geodesy, U. S. Coast and 
Geodetic Survey. 
The theory of isostasy seems to be gaining in favor with geophysicists 
and geologists. This is shown by the progress made during the past 
year or two. 
The holding of a symposium on isostasy by the Geological Society 
ERRATUM 
Vol. 13, No. 10, May 19, 1923, page 211, third paragraph from top of page, lines 4 
and 5: The expression ‘‘Type species H. coronatus n. sp.” should be deleted. 
mission Hos Dybwad,”’ in December, 1922. In this book of more than 
300 pages, the author shows that the isostatic balance was maintained 
almost, if not perfectly, in Norway during the loading of the area by 
ice-caps and after their disappearances. He makes out a strong case 
for isostasy which should be considered by those studying the processes 
operating in the earth’s crust. 
In addition to the papers referred to above, several others have 
appeared in Italy and the United States. 
At the meeting of the Section of Geodesy, of the International 
Geodetic and Geophysical Union, held at Rome, Italy, in May, 1922, 
isostasy was given some consideration. Efforts are now being made 
1 Presented at meeting of the Section of Geodesy of the American Geophysical Union, 
at Washington, D.C., April 19, 1923. Received June 8, 1923. 
267 
