196.


A FINE LACQUERED-BRASS UNIVERSAL MICROSCOPE COMPENDIUM BY BENJAMIN MARTIN, CIRCA 1774


198


signed by the eye-piece B. Martin, Invt. et Fecit, London, with triangular section pillar with rack and pinion platform adjustment, double-sided substage mirror, six numbered objective lenses, sprung ‘Bonanni’ stage, fish-plate, stage forceps and other accessories, contained in a fitted mahogany box (later) -- 12in. (30.5cm.) diameter


£4000-6000 197.


197 196 199


A FINE ‘JONES MOST-IMPROVED’-TYPE COMPOUND MICROSCOPE COMPENDIUM BY DOLLOND, LONDON, CIRCA 1800


signed on the foot as per title, the square-section shaft with front-inset rack-and-pinion strip, 7in. main tube, substage condensing lens and plano-concave mirror, together with near- complete complement of accessories including a ‘wheel of lenses’ numbered 1-6; fish-plate; live box; large and small bone slides with some original specimens; ivory tube of mica spares; sprung Bonnani spring stage; cone substage light condenser; Lieberkuhn reflector, etc., contained within original fitted mahogany box with side-securing hooks -- 4 x 13½ x 9½in. (10 x 34 x 24cm.)


Originally devised by George Adams the Younger (1750-1795) and published after his death in the 2nd edition of Adams Essays on the Microscope (1798), which W.& S. Jones purchased the copyright of, this type thus became known as the Jones Most-Improved Microscope. The London firms W.& S. Jones, Bleuler, Cary and Dollond all made these magnificent microscope compendiums, which achieved their greatest popularity in the first half of the 19th Century. This lot represents the largest ‘Jones Most-Improved’ model Dollond made and is in highly original condition.


£4000-6000


196


196 (detail)


197 (detail)


197 58 additional images online at www.charlesmillerltd.com


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