Books by J. F. T. Young:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Young, J. F. T. (John Francis Todd), 1893-1954: On the absorption spectra of thallium, aluminium, lead and tin, and arsenic (University Library, 1920), also by J. C. McLennan and H. J. C. Ireton (page images at HathiTrust)- Young, J. F. T. (John Francis Todd), 1893-1954: On the extreme ultra-violet spectra of magnesium and selenium (University Library, 1920), also by J. C. McLennan and H. J. C. Ireton (page images at HathiTrust)
- Young, J. F. T. (John Francis Todd), 1893-1954: On the optical transparency of certain specimens of fluorite (University Library, 1920), also by H. J. C. Ireton (page images at HathiTrust)
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