Fifth joint debate between George Northrop, Esq., and Hon. Wm. D. Kelley: in the Masonic Hall, Manayunk, Monday evening, October 3, 1864 : Charles S. Keyser, ..George Northrop · First published 1864Open the Tome
Joint debates between George Northrop, Esq., Democratic, and Hon. Wm. D. Kelley, RepublicanGeorge Northrop · First published 1864Open the Tome
Seventh joint debate between George Northrop, Esq., and Hon. Wm. D. Kelley: in the West Philadelphia hall, Thursday, October 6, 1864 : Charles S. Keyser, ..George Northrop · First published 1864Open the Tome
The fourth joint debate between George Northrop, Esq., and Hon. William D. Kelley, in the hall of the Spring Garden InstituteGeorge Northrop · First published 1864Open the Tome
The Fourth joint debate between George Northrop, Esq., and Hon. Wm. D. Kelley: in the hall of the Spring Garden Institute, Thursday evening, September ... moderatorGeorge Northrop · First published 1864Open the Tome
The adiabatic motion of charged particlesTheodore George Northrop · First published 1963Open the Tome
