...Note a dull red star near Algol, and a pretty pair just above Algenib... 
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」
...We shall see in a following chapter how it has been provedthat the variability of Algol is due to the occasional interposition ofa dark companion which cuts off a part of the lustre of the star...
Robert Stawell Ball 「The Story of the Heavens」
...It is to the second of these types that Algol is supposedto belong...
Cecil G. Dolmage 「Astronomy of To-day」
...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」
...Not very far off is the wonderful variable Algol, now due east, andabout 58° above the horizon...
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」
...Thus, also, we findthat Betelguese and Algol are without any perceivable indicationsof hydrogen, and Sirius has it in abundance...
Henry Warren 「Recreations in Astronomy」
...Draw a linefrom Algol to α of Perseus (Fig...
Henry Warren 「Recreations in Astronomy」
...Such anevent would evolve heat enough to make Algol flame up into a starof the first magnitude, and perhaps out-blaze Sirius or Capellain our winter sky...
Henry Warren 「Recreations in Astronomy」
...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」
...The right angle is marked by Algol...
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'」
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