Accession No

3903

Brief Description

polarimeter, by Franz Schmidt and Haensch, German, 2/2 19th Century

Origin

Germany; Berlin

Maker

Franz Schmidt and Haensch

Class

optical

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

metal (brass, iron, oxidised brass, white metal); glass; ivory

Dimensions

length 730mm; height 488mm; breadth 230mm

Special Collection

Provenance

Purchased, 26/8/1992.

Inscription

‘Franz Schmidt & Haensch.
Berlin, S. No 4580.
D.R.G.M.
No 98550.’ (analyser end)

Description Notes

Black-painted cast iron base with A-frame supports for horizontal brass beam. The polariser is fixed to this beam. Black-painted sample holder, missing cover. Push-fit double-lens brass objective. Brass eyepiece with screwfit lens and pin for altering angle of analyser crystal. Circle scale in form of ship’s wheel divided [5.6] - 0 - [35.6], numbered by 1, subdivided to 0.1; oxidised brass indicator moves over scale. Window close to central tube reveals ivory vernier with main scale divided 10 - 0 - 60, numbered by 10, subdivided to 1 and vernier scale giving readings to 0.1.

Condition good; complete.

References

Events