Accession No

6010

Brief Description

stereographic net on card, mid-20th Century

Origin

Maker

Class

earth sciences; surveying; crystallography

Earliest Date

1950

Latest Date

1950

Inscription Date

Material

card; plastic (cellotape)

Dimensions

length 179mm; breadth 126mm

Special Collection

Brian Harland collection

Provenance

Donated on or before 10/09/2004.

Inscription

Description Notes

stereographic net on card; mid 20th century

Black ink on brown card with cellotape on short edges and reverse. The stereographic projection is a 5 inch diameter Wulff net with a pin hole poked through the middle of the projection, the circumference of a drawing pin has been indented onto the reverse around the hole.

The small circles around the projection are graduated 90°-0°-90°-0°-90° by 2° and marked every 10° in print. In handwriting a second graduation runs with markings at 0°, 20°, 40°, 60°, 120°, 140°, 160°, 180°, 200°, 220°, 240°, 300°, 320°, 340°. The leaps occur where the projection touches the edges of the card. From the printed graduation both sections 10°-0°-10° are folded over the edge and onto the reverse of the card.

Condition: fair; complete

References

Events