achromatic objective, Epi 40/0.65
Date: circa 1960
Inventory Number: 1997-1-2087
Classification: Microscope Optics
Subject:
Maker: Wild Heerbrugg Ltd. (1921 - 1989)
Supplier: Wild Heerbrugg Instruments Inc. (founded circa 1955)
Cultural Region:
Place of Origin:
Dimensions:
objective: 4.1 × 2.4 × 2.4 cm (1 5/8 × 15/16 × 15/16 in.)
5.5 × 3 × 3 cm (2 3/16 × 1 3/16 × 1 3/16 in.)
Material:
Description:
Achromatic objective, Epi 40/0.65. Consists of a silver-colored, spring-loaded tube with a black milled collar.
In Collection(s)
Signedon side of tube: WILD / HEERBRUGG / SWITZERLAND
Inscribedon one side of tube: Epi 40 / 0,65 / d = 0
on other side, beneath maker's mark: 55257
on other side, beneath maker's mark: 55257
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."
This objective is intended to be used without a cover glass (per David P. Wheatland's note).
This objective is intended to be used without a cover glass (per David P. Wheatland's note).
Primary SourcesWild Heerbrugg, General Purpose and Research Microscope, WILD M20, pamphlet Mi 604 e (Heerbrugg, Switzerland, 1956).