History
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Lampemikroskopet ble oppfunnet av George Adams sr. (1708-1773) og ble beskrevet av hans sønn George Adams jr. (1750-1795) i Essays on the Microscope, etc., London 1787 (side 65).
The observer positions their eye along the optic axis, and in a plane conjugate to the objective. Given the large size and focal length of the microscope eyepiece lens, this position is located by means of a "shade" with a target hole (shown above extending left from the instrument). When the eye is correctly placed the entire eyepiece lens is illuminated, and the magnified specimen is visualized. The illuminating system was usually an oil lamp. Specimens were held in place on the specimen holder by a spring mechanism. Focusing was accomplished by turning a thumbscrew (at the observer's end) that positioned the specimen holder at the objective end. Rack and pinion mechanisms change X and Y position of the specimen. Usually, the observer used long mahogany handles to turn these pinions. These are missing from this instrument. There are three objectives with this instrument. The drawer in the bottom of the case held accessories: two additional objectives, six ivory specimen holders for transparent plant specimens, six ebony holders for opaque specimens, and three wooden holders containing insect specimens.
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Bruk
- Bruker, ikke eier Fysisk Institutt, Universitetet i Oslo sikker
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Produksjon - 1780 — 1795 (antatt)
Protokollført av universitetet 1843 - Produsent Adams, George d.y. sikker
- Production place Storbritannia England sikker
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Relation
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Object/Work – Components
2 related objects
- Thing Kasse med mikroskop (NTM 9229.1)
- Thing Stativ med projeksjonsapparat (NTM 9229.2)
Classification
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- Naturvitenskap (Outline) OU 815
References
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- Arkivreferanse Gjenstandsarkiv Universitetets protokoll
- Negativplassering 135-544
- Digitalt bilde CD 2000-04
- Litteraturreferanse R.S.Clay & T.H.Court: The History of the Microscope, London 1975, s. 223
License information
- License Contact owner for more information
Metadata
- Identifier NTM 09229
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Alternative name
- N 183 - Fra tidligere eier
- O 75ab - Fra tidligere eier
- Part of collection NTM
- Owner of collection Norsk Teknisk Museum
- Institution Norsk Teknisk Museum
- Date published August 11, 2014
- Date updated April 22, 2021
- DIMU-CODE 011024256872
- UUID 8d8c7e5d-5502-4299-8b61-24cc3485560a
- Tags
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