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Compound Microscope, by Andrew Pritchard, London, c. 1835

preview image for Compound Microscope, by Andrew Pritchard, London, c. 1835
Inventory Number: 53541
Object Type: Object
Persons: Andrew Pritchard
Date Created:
Place Created: London England United Kingdom Europe
Subject Classification(s): Microscopy  
Brief Description: This copper alloy instrument stands on a cylindrical pillar on a flat tripod foot. An inner pillar telescopes upward and is held in place by a tightening collar. The cylindrical limb is carried on a compass joint. A rack and pinion extends a bar, with a triangular cross section, from within the limb that carries the body tube on an arm. The eyepiece pushes into the top of the body and a spring-mounted nose has an internal thread to take an objective. None are present. A screw collar around the lower end of the body can extend and retract the nose for fine focusing. The mechanical stage has a rectangular stage plate with a bracket on two pegs to hold slides. A circular spring stage attaches to the stage hole by a bayonet fitting. A sliding sleeve carries the concave mirror in a horseshoe mount on the lower end of the limb. A plaster disk is on the reverse of the mirror.
Primary Inscriptions: "Andrew Pritchard Fleet Street London no 122" on the base
Provenance: Purchased from Dr. Reginald S. Clay with his collection
Collection Group: Clay Collection
Material(s): copper alloy
Glass
metal
Dimensions:
Height Width Depth Diameter Unit
390 215 180 mm

Narratives

Image with multimedia irn 45175

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