The 'Binden Blood Stoney' Powell & Lealand No.1 Binocular Microscope, English, dated 1875, signed in script to the top of the bar-limb ‘POWELL & LEALAND, 170 Euston Road, London’, and further signed in fine script to the stage 'TELFORD PREMIUM 1874, Awarded By THE INSTITUTE OF CIVIL ENGINEERS TO Bindon Blood Stoney MA. M. Inst C.E.', of standard No.1 construction, standing on a massive lacquered tripod base with rectangular feet each with cork pads, trunnions to the top supporting the body, with large plano-concave mirror to the base as typically supported on one side at the end of an articulated arm on a sliding collar, above which is the fully mechanical sub-stage with X & Y control via screw and rotation controlled through a crown and gear, with focusing via rack and pinion to the rear, with full circuit stage, silver circular scale and vernier, rotation controlled via an inverted crown and gear mechanism that can be disengaged for quick movement, with large Turrel-type mechanical stage with X-Y control, main course focus to rear of body, bar-limb incorporating fine focus lever mechanism, nose piece with prism blanking plate, limb with threaded boss to accept binocular or monocular tubes, the microscope comes with the following accessories in a fitted mahogany case: A 4in objective signed ‘Powell & Lealand’ & can. A 3in objective & can. A 2in objective & can. A 1in objective & can. A 1/2in objective signed ‘Powell & Lealand’ & can. A 1/4in objective signed ‘Powell & Lealand’ & can. A 1/8in objective signed & can. A 1/8 immersion end cap. A 1/12in objective signed ‘Powell & Lealand’ & can. four Leiberkuhns. A pair of low power binocular eyepieces. A Pair of medium power binocular eyepieces. A medium power micrometer eyepiece. A high power eyepiece. A high power eyepiece. A pair of eyepiece collars. A substage spot lens. A substage polariser. A substage Wenham-type parabolic condenser. A substage achromatic condenser engraved ‘Powell & Lealand’. A substage set of selenite disks. A substage dark well holder and set of three darkwells. A micrometer slide. A Livebox. Stage forceps. A set of brass forceps. A side reflector on an articulated arm. A bulls-eye condenser on an articulated arm. A leather case with a binocular prism engraved ‘Powell & Lealand N.81 PATENT’. A leather case with a binocular prism engraved ‘For Low Powers & Opaque Objects’. A steel adjustment bar. Along with two Short body tubes and a large table bulls-eye condenser in the main cabinet. Bindon Blood Stoney (1828–1909) was a civil engineer, born at Oakley Park. King's Co., Ireland, on 13 June 1828, The Institution of Civil Engineers awarded him, in 1874, a Telford medal and premium of £100.00 for a paper on his work on the Dublin harbour northern quays. The work included extending the northern quays of the docks to the east, and he began works on the Alexandra basin. In the construction of the northern quays he employed concrete monoliths of the then unprecedented weight of 350 tons, and designed the appliances necessary for handling and setting the huge blocks. He also rebuilt the Grattan and O'Connell bridges, and built the Butt bridge across the Lifley. This lot comes with an A4 folder of research assembled by the vendor on the history of the microscopes previous owners and includes copies of wills and auction catalogues.