...The computation can be very greatly abridged by the useof logarithms... 
George C. Comstock 「A Text-Book of Astronomy」
...Themagnitudes being themselves logarithms of a kind, it is evidently moreconvenient to use a simple value of the logarithm of the ratio of intensitythan to use this ratio itself...
Carl Vilhelm Ludvig Charlier 「Lectures on Stellar Statistics」
...The invention of logarithms, by Baron Napier, of Merchistoun, was foundto be of inestimable value to astronomers in facilitating andabbreviating the methods of astronomical calculation...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
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