Weeks, Mary Elvira, 1892- Discovery of the elements. Completely rev. and new material added by Henry M. Leicester. Illus. collected by F. B. Dains.

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Weeks, Mary Elvira, 1892-

Discovery of the elements. Completely rev. and new material added by Henry M. Leicester. Illus. collected by F. B. Dains.

Chemical elements.

Chemistry -- History.

Chemists.

Leicester, Henry Marshall, 1906-