'.... Explaining Their Construction, Adjustments, And Use: With An Appendix and Tables'. Following the main text and bound in is: 'Catalogue of Instruments made by Troughton And Simms, Opticians, And Mathematical Instrument Makers To The Honourable Board of Ordnance,'. This copy has related pamphlets, news paper cuttings, etc. laid down or stuck in including: A Plea For Reflectors being a description of the New Astronomical Telescopes with Silvered-Glass Specula: and Instructions for Adjusting and Using Them by John Browning, fourth edition, London, 1870, 36 pages with illustrations and list of prices. A Description of The Dipleidoscope, or Double-Reflecting Meridian and Altitude Instrument; with plain instructions for the method of using it in the correction of time-keepers by Edward J. Dent, published by the author, London, 1844, 24 pages. The Star Finder and How To Use It Manufactured by Horne & Thornthwaite Opticians .... no date (c.1862) 8 pages. Catalogue of Optical, Philosophical and Mathematical Instruments, made and sold by Andrew Ross ... Holborn, 1856, 12 pages.