Accession No

3754

Brief Description

achromatic compound microscope, binocular; made by W. Watson & Sons Ltd.; 1875 - 1925

Origin

313 High Holborn; London; England

Maker

W. Watson & Sons Ltd.

Class

microscopes

Earliest Date

1875

Latest Date

1925

Inscription Date

Material

metal (brass, steel, two types of white metal); glass; wood; paper (card); plastic (ivorine)

Dimensions

height 357mm; breadth 215mm; depth 220mm box breadth 268mm; depth 255mm; height 415mm

Special Collection

Provenance

Donated, 1990.

Inscription

‘W. Watson & Sons, Ltd
313 High Holborn
London’ (stand)
‘“Royal”’ (stand)
‘High Power Binocular
W. Watson & Sons, Ltd
313 High Holborn
London
51528’ (front)
‘W. WATSON & SONS, LTD
MANUFACTURERS
313, High Holborn;
LONDON.’ (ivorine plaque on inside of box door)

Description Notes

Black-painted finish to microscope and brass fittings. Kettledrum tripod foot, cork shod. Tailpiece with swinging plano-concave mirror and substage condenser with lateral and longitudinal adjustment; vertical movement of substage operated by knurled brass screw. Square mechanical stage with large central aperture; lateral and longitudinal adjustments screw-operated; lateral scale divided 0 - 50, numbered by 10, subdivided to 1; longitudinal scale divided 70 - [105], numbered by 10, subdivided to 1; verniers read to 0.1 on each scale. Ratchet coarse focussing mechanism with double pinion adjustment. Fine focus knob on top of limb. Binocular eyepiece with lateral adjustment operated by knurled screw. Right eyepiece is compensating. Two push-fit eyepieces in place. Three-objective rotating nosepiece with one objective by Baker and two by Watson.
Fitted wooden case with brass hinges, carrying handle and lock; steel key. Case contains objective by Watson in brass case with screw-fit lid, another case for objective, one spare substage condenser, one condenser mount, one spare eyepiece, one eyepiece mask, and spare central column for microscope. Registration card in door with guarantee on reverse (registration not filled in).

Condition generally good but unacceptable corrosion on body, box has large crack on door; complete.

References

Events