TY - JOUR T1 - Note on Archdeacon Pratt's Paper on the Effect of Local Attraction on the English Arc JF - Proceedings of the Royal Society of London (1854-1905) VL - 9 SP - 496 EP - 497 PY - 1857/01/01/ UR - http://dx.doi.org/10.1098/rspl.1857.0097 M3 - doi:10.1098/rspl.1857.0097 AU - Clarke, C. ER -