XXVI. A series of observations on, and a discovery of, the period of the variation of the light of the bright star in the head of medusa, called algol. In a letter from John Goodricke, Esq. to the Rev. Anthony Shepherd, D. D. F. R. S. and Plumian Professor at Cambridge

Abstract

Sir, I take the liberty to transmit to you the following account of a very singular variation in Algol or β or Persei, which you will oblige me by presenting to the Royal Society, if you think it deserving that notice.