Books by Frank Wallis:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Wallis, Frank: The dynamo (The Macmillan co. [etc., 1909), also by Charles Caesar Hawkins (page images at HathiTrust)- Wallis, Frank: The dynamo (Whittaker & co., 1896), also by Charles Caesar Hawkins (page images at HathiTrust)
Find more by Frank Wallis at your library, or elsewhere.