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Radcliffe Tracts 46 (1)Barrow, J.
A Description of Pocket and Magazine Cases of Mathematical Drawing Instruments, in which is explained the Use of each Instrument, and particularly of the Sector and Plain Scale, in the Solution of a Variety of Problems; likewise, the Description, Construction, and Use, of Gunter's Scale
London: Printed for J. and W. Watkins, no. 5, Charing-Cross, Optical, Mathematical, and Philosophical, Instrument Makers to their Royal Highnesses the Duke and Duchess of York, and His Royal Highness the Duke of Clarence, 1792.