achromatic-aplanatic condenser, n.a. 0.70/0.95/1.30
Date: circa 1960
Inventory Number: 1997-1-2130
Classification: Microscope Condenser
Subject:
Maker: Wild Heerbrugg Ltd. (1921 - 1989)
Supplier: Wild Heerbrugg Instruments Inc. (founded circa 1955)
Cultural Region:
Place of Origin:
Dimensions:
condensor: 6 × 6 × 5.4 cm (2 3/8 × 2 3/8 × 2 1/8 in.)
case: 7.5 × 11.9 × 8.4 cm (2 15/16 × 4 11/16 × 3 5/16 in.)
Material:
Accessories: black faux-leather case; front lenses (2); sliding metal shutter
Description:
Achromatic-aplanatic condenser, n.a. 0.70/0.95/1.30. The condenser has an iris diaphragm and a swing-out filter carrier. It is stored in a black faux-leather case, along with two front lenses and a thin, black sliding metal shutter. The shutter, shaped like the feather on an arrow, can be inserted just beneath aperture. The front lenses snap gently into place atop condensor; one is stored in place on condensor, the other separately in the case.
In Collection(s)
Signedon top of case, and on side of condensor: WILD / HEERBRUGG
Inscribedstamped on top of case: Achr. apl. Kondensor / nA- 0,7 0,95 1,3
stamped on side of condensor: achr. apl. / nA = 0,7 0,95 1,3 / No. 10622
stamped on top on front lens A: nA=1,3
inscribed on underside of front lens A: 10622
stamped on top of front lens B: nA=0,95 / d=1,2
inscribed on underside of front lens B: 10632
stamped on side of condensor: achr. apl. / nA = 0,7 0,95 1,3 / No. 10622
stamped on top on front lens A: nA=1,3
inscribed on underside of front lens A: 10622
stamped on top of front lens B: nA=0,95 / d=1,2
inscribed on underside of front lens B: 10632
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 this particular instrument see, Prospectuses, Mi 614 and Mi 520.
For further details about this particular instrument see, Prospectuses, Mi 614 and Mi 520.
Primary SourcesWild Heerbrugg, General Purpose and Research Microscope, WILD M20, pamphlet Mi 604 e (Heerbrugg, Switzerland, 1956).