TY - JOUR T1 - Some Experiments Propos'd in Relation to Mr. Newtons Theory of Light, Printed in Numb. 80; Together with the Observations Made Thereupon by the Author of That Theory; Communicated in a Letter of His from Cambridge, April 13. 1672 JF - Philosophical Transactions (1665-1678) VL - 7 SP - 4059 EP - 4062 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1672.0019 M3 - doi:10.1098/rstl.1672.0019 AU - Newton, M. ER -