Frontispiece of A New System of Mathematicks by Jonas Moore, 1681. This book, intended for the mathematical school at Christ's Hospital, was uncompleted on Moore's (1617-1679) death and was finished by John Flamsteed (1646-1719) and John Perkins. It was a textbook for the boys of the school learning surveying and navigation, skills needed to aid the nation's trade and exploration.
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