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daylight filter 50 mm x 62 mm
daylight filter 50 mm x 62 mm

daylight filter 50 mm x 62 mm

Datecirca 1960
Inventory Number1997-1-2152
ClassificationFilter
Subject
    Maker Wild Heerbrugg Ltd. 1921 - 1989
    Supplier Wild Heerbrugg Instruments Inc. founded circa 1955
    Cultural Region
      Place of Origin
        Dimensions0.2 × 5 × 6.2 cm (1/16 × 1 15/16 × 2 7/16 in.)
        Material
          DescriptionRectangular light blue glass filter 50 mm x 62 mm.
          In Collection(s)
          Signedunsigned
          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." The object shape and size do not match the object name as given on the invoice. The original invoice calls this filter, "daylight filter 50mm x 50mm."
          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.
          glass filter 50 mm x 70 mm
          glass filter 50 mm x 70 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2151
          green filter, 50mm x 50 mm
          green filter, 50mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2196
          daylight filter, diam. 33 mm
          daylight filter, diam. 33 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2156
          daylight filter, frosted, diam. 33 mm
          daylight filter, frosted, diam. 33 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2157
          blue filter 50 mm x 50 mm
          blue filter 50 mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2166
          yellow filter 50 mm x 50 mm
          yellow filter 50 mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2164
          red filter, 50 mm x 50 mm
          red filter, 50 mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2168
          contrast filter 50 mm x 50 mm
          contrast filter 50 mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2169
          heat absorbing filter 50 mm x 50 mm
          heat absorbing filter 50 mm x 50 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2155
          green filter, diam. 33 mm, thickness 4 mm
          green filter, diam. 33 mm, thickness 4 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2159
          blue filter, diam. 33 mm
          blue filter, diam. 33 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2165
          heat absorbing filter, diam. 33 mm
          heat absorbing filter, diam. 33 mm
          Wild Heerbrugg Ltd.
          Date: circa 1960
          Object number: 1997-1-2154