A Treatise on Mathematical Instruments: Including Most of the Instruments Employed in Drawing. E-book. Formato PDF John Fry Heather   -  Forgotten Books, 2017  - 

AN attempt has been made in the following pages to put within the reach of all a short and compendious treatise upon some of the ingenious instruments by which the scientific practitioner is aided in his observations, and in the delineation of the results obtained from them.