TY - JOUR T1 - Difficulties in the Newtonian Theory of Light, Considered and Removed, by the Rev. S. Horsley, LL. B. F. R. S. JF - Philosophical Transactions (1683-1775) VL - 60 SP - 417 EP - 440 PY - 1770/01/01/ UR - http://dx.doi.org/10.1098/rstl.1770.0038 M3 - doi:10.1098/rstl.1770.0038 AU - Horsley, S. ER -