plano-concave microscope mirror

Datecirca 1960

Inventory Number1997-1-2202

ClassificationMicroscope Light Source

Subject

Maker Wild Heerbrugg Ltd. 1921 - 1989

Supplier Wild Heerbrugg Instruments Inc. founded circa 1955

Cultural Region

Place of Origin

Dimensions1 x 5.8 x 7.3 cm (3/8 x 2 5/16 x 2 7/8 in.)

Material

DescriptionA double-sided microscope mirror in a fork mount. One side of the mirror is plane, the other concave.

In Collection(s)

Wild M20 Compound Microscope

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." This mirror is probably Part Number 6000 (see Main Manual, pp. 22 and 52), but it does not appear anywhere on the original invoice. it is not clear whether this mirror differs from 1997-1-2192 [Part Number 6007], the "front surface mirror," which does appear on the invoice> The two mirrors are hard to tell apart, except that the glass of 1997-1-2192 is more clean.

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.