Books by John Benjamin Henck:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Henck, John Benjamin, 1816-1903: Field-book for railroad engineers. (Appleton, 1869) (page images at HathiTrust)- Henck, John Benjamin, 1816-1903: Field-book for railroad engineers. Containing formulae for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates, deflections, long chords, logarithms, logarithmic and natural sines, tangents, etc., etc. (D. Appleton, 1881) (page images at HathiTrust)
- Henck, John Benjamin, 1816-1903: Field-book for railroad engineers. Containing formulas for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates deflections, long chords, magnetic variation, logarithms, logarithmic and natural sines, tangents, etc., etc. (D. Appleton, 1877) (page images at HathiTrust)
Find more by John Benjamin Henck at your library, or elsewhere.