...A binary system of counting is shown in the following numerals:—... 
Robert W. Williamson 「The Mafulu」
...All these threeclasses of binary systems are now known to be very numerous...
E. Walter Maunder 「Are the Planets Inhabited?」
...The uncertainty with regard to the controlling influenceof gravity was removed by Herschel when he made his important discoveryof binary star systems...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...By means of the spectroscope Capella is shown to be really composed oftwo stars (one about twice as bright as the other) situated very closetogether and forming a binary system...
Cecil G. Dolmage 「Astronomy of To-day」
...Procyon is also a binary, its companion having been discovered byProfessor J...
Cecil G. Dolmage 「Astronomy of To-day」
...The components of this celebrated binary are both nearlyof the third magnitude, distance about 5...
Garrett Serviss 「Pleasures of the telescope」
...The star 25 (Σ 1768) is a close binary with a periodestimated at one hundred and twenty-five years...
Garrett Serviss 「Pleasures of the telescope」
...We begin our attack with the five-inchon Σ 1932, but not too confident that we shall come offvictors, for this binary has been slowly closing for manyyears...
Garrett Serviss 「Pleasures of the telescope」
...Much more interesting, however, is 70, a binary whosecomponents have completed a revolution since theirdiscovery by Sir William Herschel, the period beingninety-five years...
Garrett Serviss 「Pleasures of the telescope」
...It is, no doubt, a binary...
Garrett Serviss 「Pleasures of the telescope」
...It is notknown that they constitute a binary system, because nocertain evidence of motion has been obtained...
Garrett Serviss 「Pleasures of the telescope」
...The tenth-magnitude staris a binary of short period (probably less than fifty years),the distance of whose components was 2" in 1859, 1" in1880, 0...
Garrett Serviss 「Pleasures of the telescope」
...Sweeping a little way northward we comeupon an interesting binary, λ, which is unfortunately beyondthe dividing power of our largest glass...
Garrett Serviss 「Pleasures of the telescope」
...This star is a binary, butthe motion is slow...
Garrett Serviss 「Pleasures of the telescope」
...Later he said: “I adhere to the conviction thatProcyon and Sirius form real binary systems, consisting of a visible and aninvisible star...
George Forbes 「History of Astronomy」
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