Accession No

1516

Brief Description

achromatic compound microscope, petrological, “Advanced student” model, by J. Swift and Son, English, 1935 (c)

Origin

England; London

Maker

J. Swift and Son

Class

microscopes

Earliest Date

1935

Latest Date

1935

Inscription Date

Material

metal (brass); glass

Dimensions

height 368mm; depth 210mm; breadth 124mm

Special Collection

Provenance

Transferred from the Sedgwick Museum of Earth Sciences, University of Cambridge.

Inscription

‘J Swift & Son
London
17327’ (in logo)

Description Notes

“Advanced student” model. Horse shoe foot; black finish with brass fittings; single upright to pivoting limb, with a ledge to support the instrument in a horizontal position; circular brass stage with a knurled edge graduated 0- (360) by 10 to 1; substage condenser on swinging arm with lateral screw motion; iris diaphragm; (upper condenser lens not present); polariser on separate arm; flange graduated 0- (360) by 45; swinging plano/concave mirror on a shoe round tubular tailpiece; moulded column to cranked limb; knurled brass coarse focus screws either side of the limb; fine focus screw at the head of the column graduated (0) - 5mm to 0.1; index on the back of the limb; push fit eyepiece; flange round the head of the body; slot in box for Bertrand lens; box in lower part of body for analyser with slot below; covered slot just above triple nose piece; 2 objectives extant.

References

Events