Accession No

1647

Brief Description

achromatic compound microscope; made by Powell & Lealand; 1843 -1847

Origin

24 Clarendon Street; Somers Town; England

Maker

Powell & Lealand

Class

microscopes

Earliest Date

1843

Latest Date

1847

Inscription Date

Material

metal (brass, steel); cork; glass; wood

Dimensions

height 411 mm; depth 223 mm; breadth 151 mm; box height 434mm; depth 258mm; breadth 208mm; objectives bag length 105 mm; breadth 120 mm; thickness 25 mm

Special Collection

Provenance

Transferred from the Department of Colloid Science, University of Cambridge, in 06/1973.

Inscription

‘Powell & Lealand
Makers
London’ (on bar limb)
‘Powell & Lealand
Opticians
24 Clarendon Street
Somers Town’ (trade card in box)

Description Notes

Bar limb microscope; brass; kettle drum tripod base with cork shoes; tubular limb to rotating fully mechanical stage; swinging plano-concave mirror; triangular racked column with large knurled screws either side of instrument operating coarse focus; fine focus by knurled screw on side of bar - limb, cone actuated; struts connect to body to the bar limb.
Fitted wooden box; with inner box of accessories: 2 eye pieces with slot on shades; ‘1/2’ ‘inch’; the 3 lathes with push-fit lieberkuhns; rotating diaphragm; stage forceps with steel head; stage condenser rack focussed substage achromatic condenser; 3 dark stops; (several items missing). Spare [stage] live box.

References

Events