Heather, J. F. (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.). J. Weale.
Chicago Style (17th ed.) CitationHeather, J. F. 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.
MLA (9th ed.) CitationHeather, J. F. 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. J. Weale, 1853.