19th Nov, 2021 12:00

Fine Photographica & Instruments of Science

 
Lot 369
 

A Large Ross No.1 Binocular Microscope Re-Fitted by Powell & Lealand

c.1858, signed to the back of the foot 'A ROSS, London 1919', standing on a massive 'Y' shaped base with tall uprights supporting the body of the microscope on large trunnions, with large plano-concave mirror on an articulated arm, substage with rack and pinion focusing, screw X-Y adjustment with early Ross (non RMS) diameter collar, stage with geared rotation, and X-Y control, large rectangular sectioned bar with bar limb on top with integeral fine focus mechanism, with later adapted Binocular Tubes with provision to seperate inot a monocular tube, With a large amount of Ross & Powell & Lealand acessories, accessories in the seperate case include five Powell & Lealand Objectives and cans, one objective by Ross, a substage Spot lens, a Wenham Parabolic condenser, three sets of binocular eyepieces, eyepiece analyser and other accessories, the main cabinet contains a Powell & Lealand achromatic condenser, a Powell & Lealand condenser with swing out selenite disks, stage condenser and reflector, dark wells, monocular tube, lathe stage, a Gillet condenser signed by A Ross, a large polariser, four outher eyepieces, all in the original brass bound French polished cabinet with double doors,

Condition Report:

Optical Condition: the Wenham prism has a small nibble to the leading edge that can’t be seen in the image. There is a crack across the top but again this does not seem to effect the image. The binocular works best with the 1in objective

Mechanical condition: no noticeable issues

Estimated at £12,000 - £14,000

 

c.1858, signed to the back of the foot 'A ROSS, London 1919', standing on a massive 'Y' shaped base with tall uprights supporting the body of the microscope on large trunnions, with large plano-concave mirror on an articulated arm, substage with rack and pinion focusing, screw X-Y adjustment with early Ross (non RMS) diameter collar, stage with geared rotation, and X-Y control, large rectangular sectioned bar with bar limb on top with integeral fine focus mechanism, with later adapted Binocular Tubes with provision to seperate inot a monocular tube, With a large amount of Ross & Powell & Lealand acessories, accessories in the seperate case include five Powell & Lealand Objectives and cans, one objective by Ross, a substage Spot lens, a Wenham Parabolic condenser, three sets of binocular eyepieces, eyepiece analyser and other accessories, the main cabinet contains a Powell & Lealand achromatic condenser, a Powell & Lealand condenser with swing out selenite disks, stage condenser and reflector, dark wells, monocular tube, lathe stage, a Gillet condenser signed by A Ross, a large polariser, four outher eyepieces, all in the original brass bound French polished cabinet with double doors,

Condition Report:

Optical Condition: the Wenham prism has a small nibble to the leading edge that can’t be seen in the image. There is a crack across the top but again this does not seem to effect the image. The binocular works best with the 1in objective

Mechanical condition: no noticeable issues

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