Sir Robert Stawell Ball (1 July 1840 - 25 November 1913) was an Irish astronomer. In 1867 he became Professor of Applied Mathematics at the Royal College of Science in Dublin. In 1874 Ball was appointed Royal Astronomer of Ireland and Andrews Professor of Astronomy in the University of Dublin at Dunsink Observatory. In 1892 he was appointed Lowndean Professor of Astronomy and Geometry at Cambridge University at the same time becoming director of the Cambridge Observatory. The Ball family came originally from Morebath in Devon. The book was produced as a memorial tribute by his son. This rare book was produced from a digital copy held by the Bodleian Library that can be downloaded from Google Books. Google has sponsored the digitisation of books from several libraries. Those on which copyright has expired are available for free educational and research use, both as individual books and as full collections to aid researchers. The copy of the book was produced by Forgotten Books.