Accession No

1614

Brief Description

Abbe’s Apertometer, by Carl Zeiss, German, 1/4 20th Century

Origin

Germany; Jena

Maker

Carl Zeiss

Class

optical

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

wood (mahogany); metal (brass, oxidised brass, at least 3 white metals); glass; cloth (velvet)

Dimensions

length 127mm; breadth 62mm; thickness 17mm box length 186mm; breadth 101mm; height 52mm

Special Collection

Provenance

Transferred from the Department of Mineralogy & Petrology, University of Cambridge, in 01/06/1972.

Inscription

‘1.530
Abbe’s
Apertometer
Carl Zeiss Iena.’ (front)
‘Apertometer
System’ (magnifier)
‘C. ZEISS
JENA’ (magnifier case)

Description Notes

Abbe’s apertometer, by Zeiss, 1/4 20th C.

Semicircular piece of glass set on white metal semicircle; groove in metal plate around glass in which two indices can move. Two scales on glass, one divided 1.4 - 0 - 1.4, numbered by 0.2, subdivided to 0.05; the other divided 80 - 0 - 80, numbered by 10, subdivided to 5. Magnifying system set in brass body and housed in brass case with screw top.
Fitted mahogany box with white metal hinges and brass hook fasteners; partially lined with mulberry velvet.
Contains card of Mr. Arthur Hutchinson of Pembroke College.

Condition good; complete.

References

Events