...Not far off is a very curious star, β of Perseus, or Algol, whichforms a little triangle with two others smaller than itself... 
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...It was bysupposing the existence of a dark companion to Algol that its discoverer,Goodricke of York, in 1783, explained variable starsof this type...
George Forbes 「History of Astronomy」
...There are many variables of the Algol type, and information issteadily accumulating...
George Forbes 「History of Astronomy」
...The most easterly one is βPersei, known as Algol, the famous variable...
William Tyler Olcott 「A Field Book of the Stars」
...—A line drawn from the star γ Pegasi to Algol in Perseuspasses through β Trianguli...
William Tyler Olcott 「A Field Book of the Stars」
...It is to the second of these types that Algol is supposedto belong...
Cecil G. Dolmage 「Astronomy of To-day」
...Gore thinks that the companion of Algol may be a starof the sixth magnitude...
Cecil G. Dolmage 「Astronomy of To-day」
..., Algol, the most famous of these variablestars, at its maximum of brightness furnishes three timesas much light as when at its minimum, and other variablestars show an even greater range...
George C. Comstock 「A Text-Book of Astronomy」
...In this case, atany rate, the conjecture hazarded about Algol, that the star revolvesaround a dark central orb, would be insufficient to account for theobserved variation...
Richard A. Proctor 「Half-hours with the Telescope」
...The chief attraction in Perseus is the changeful andwonderful β, or Algol, the great typical star among theshort-period variables...
Garrett Serviss 「Pleasures of the telescope」
...In other words, once in every two daystwenty hours and forty-nine minutes Algol, as seen fromthe earth, undergoes a partial eclipse...
Garrett Serviss 「Pleasures of the telescope」
...The diameter of Algol is believed to be about1,125,000 miles, that of the dark body about 840,000 miles,and the mean distance from center to center 3,230,000miles...
Garrett Serviss 「Pleasures of the telescope」
...Note a dull red star near Algol, and a pretty pair just above Algenib...
William Tyler Olcott 「A Field Book of the Stars」
...The most interesting variable star in the heavens is Algol (the demon),in the constellation Perseus...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...The variable star Algol orCaput Medusæ, which marks the head of Gorgon, was accounted 'the mostunfortunate, violent, and dangerous star in the heavens...
Richard A. Proctor 「Myths and Marvels of Astronomy」
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