TY - JOUR T1 - On the Periods of the Changes of Light in the Star Algol. In a Letter from John Goodricke, Esq. to the Rev. Anthony Shepherd, D. D. F. R. S. Professor of Astronomy at Cambridge JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 74 SP - 287 EP - 292 PY - 1784/01/01/ UR - http://dx.doi.org/10.1098/rstl.1784.0023 M3 - doi:10.1098/rstl.1784.0023 AU - Goodricke, J. ER -