A treatise on mathematical instruments :
including most of the instruments employed in drawing, for assisting the vision, in surveying and levelling, in practical astronomy, and for measuring the angles of crystals : in which their construction, and the methods of testing, adjusting, and using them, are concisely explained
/ by J.F. Heather.

APA Citation

Heather, J. F. (John Fry). (1853). A treatise on mathematical instruments: including most of the instruments employed in drawing, for assisting the vision, in surveying and levelling, in practical astronomy, and for measuring the angles of crystals : in which their construction, and the methods of testing, adjusting, and using them, are concisely explained. 2nd ed., with corrections. London: J. Weale.

MLA Citation

Heather, J. F. (John Fry), -1886. A Treatise On Mathematical Instruments: Including Most of the Instruments Employed In Drawing, for Assisting the Vision, In Surveying And Levelling, In Practical Astronomy, And for Measuring the Angles of Crystals : In Which Their Construction, And the Methods of Testing, Adjusting, And Using Them, Are Concisely Explained. 2nd ed., with corrections. London: J. Weale, 1853.