universal phase condenser
Date: circa 1960
Inventory Number: 1997-1-2131
Classification: Microscope Condenser
Subject:
Maker: Wild Heerbrugg Ltd. (1921 - 1989)
Supplier: Wild Heerbrugg Instruments Inc. (founded circa 1955)
Cultural Region:
Place of Origin:
Dimensions:
5.4 × 13.3 × 11.3 cm (2 1/8 × 5 1/4 × 4 7/16 in.)
Material:
Description:
Single unit made up of a phase condenser, an adjustable iris diaphragm, and a swing-out filter carrier, all mounted on a revolving disc with three individually centerable annular diaphragms. Two milled knobs, apparently for fine tuning, stick out from the sides like antenna.
The condenser is stored in a custom-made faux leather case marked "Varicolor" [catalogued separately as 1997-1-21310]. The case holds additional accessories, including an auxiliary microscope [1997-1-2134] and three Varicolor phase fluotar objectives [1997-1-2097, -2099, and -2101].
The condenser is stored in a custom-made faux leather case marked "Varicolor" [catalogued separately as 1997-1-21310]. The case holds additional accessories, including an auxiliary microscope [1997-1-2134] and three Varicolor phase fluotar objectives [1997-1-2097, -2099, and -2101].
In Collection(s)
Signedon top of disc: WILD / HEERBRUGG / SWITZERLAND
Inscribedjust beneath maker's mark on top of disc: 13700
around edge of disc: 10 20/40 50/100
on side of condensor: Univ. Kd.
around edge of disc: 10 20/40 50/100
on side of condensor: Univ. Kd.
Historical AttributesOn September 2, 1960, David P. Wheatland ordered a Wild research microscope, model M20 KGS along with a comprehensive assortment of accessories and nearly all the attachments offered. He told the Wild vendor that:
"It is intended to use all thse for comparison, demonstration, and some for investigation. Eventually perhaps other basic instruments may be ordered and the accessories distributed among them. We are anxious therefore to have the list as complete as possible to make all the tests and optical experiments."
DPW also ordered a complete set of brochures for the library.
The initial cost of the purchase was $6000.
"It is intended to use all thse for comparison, demonstration, and some for investigation. Eventually perhaps other basic instruments may be ordered and the accessories distributed among them. We are anxious therefore to have the list as complete as possible to make all the tests and optical experiments."
DPW also ordered a complete set of brochures for the library.
The initial cost of the purchase was $6000.
Curatorial RemarksThe original invoice for the Wild M20 compound microscope (in file) contains 152 items. Most accessories are catalogued under CHSI inventory numbers running from 1997-1-2062 to 1997-1-2223, and are stored separately. The microscope stand is 1997-1-0722 and the case is 1997-1-0723. All items are linked together in the Object Package "Wild M20."
For further details about the universal phase condenser and related equipment, see Prospectuses, pamphlet Mi 633, pp. 10-11, and the Main Manual, pp. 38-40.
For further details about the universal phase condenser and related equipment, see Prospectuses, pamphlet Mi 633, pp. 10-11, and the Main Manual, pp. 38-40.
Primary SourcesWild Heerbrugg, General Purpose and Research Microscope, WILD M20, pamphlet Mi 604 e (Heerbrugg, Switzerland, 1956).