Some causes of volcanic activity
By: an address by Arthur L. Day, on the occasion of the centenary celebration of the founding of the Franklin Institute and the inauguration exercises of the Bartol Research Foundation, September 17, 18, 19, 1924.
Publisher: The Franklin Institute
Published: 1925
Place of publication: Philadelphia
Language: eng
Number of pages: 24
Subjects: Franklin Institute (Philadelphia, Pa.); Volcanoes
Notes: Published also in the Smithsonian Institution's Annual report, 1925 (Washington, 1926)