| AL : 
SS iv). : 
Vou. 13 February 4, 1923 No. 3 
- JOURNAL 
OF THE 
WASHINGTON ACADEMY 
OF SCIENCES 
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SIDNEY PAIGE E, D. WILLIAMSON E. P. Kite 
GEOLOGICAL SURVEY GEOPHYSICAL LABORATORY NATIONAL MUSEUM 
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Entered as Second Class Matter, January 11, 1928, at the post-office at Baltimore, Md., under tke 
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