An examination of the century question : To which is added, a letter to the author of 'Outlines of astronomy' [Sir J.F.W. Herschel], respecting a certain peculiarity of the Gregorian system of bissextile compensation / [By A.G. Brae?].

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An examination of the century question : To which is added, a letter to the author of 'Outlines of astronomy' [Sir J.F.W. Herschel], respecting a certain peculiarity of the Gregorian system of bissextile compensation / [By A.G. Brae?]. Public Domain Mark. Source: Wellcome Collection.