- Subject
- Microscopy
- Item type
- Object
- Provenance
- Deposited by the Royal Microscopical Society with their collection. Presented by James Swift, 13 May 1868
- Primary inscriptions
- "SWIFT'S UNIVERSAL ACHROMATIC TINTED CONDENSOR" on tube
- Object type
- Microscope accessory
- Dimensions
- Height: 95mm Width: 115mm Depth: 75mm Weight: 292g
- Inventory No
- 66991
- Accession Number
- 1970-101/part
Description
This piece of apparatus combines a sub stage condenser containing a field lens in blue glass with rack adjustment for focusing, a sliding frame with two central stops for dark-ground illumination and a large wheel that carries on it four items: seven-graded aperture disc, 3 aperture disc that rotates behind the Nicol prism polarizer, a revolving cap for test objects, and a shutter for oblique light.
?
The design was suggested by W H Hall and described by him in 'On a new form of condenser with a blue tinted field lens' (TransRMS 16 (1868))95
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