Accession No

2673

Brief Description

graphometer, by Etienne Lenoir, French, 1775-1800

Origin

France; Paris

Maker

Lenoir, Etienne

Class

surveying

Earliest Date

1775

Latest Date

1800

Inscription Date

Material

metal (brass, steel, white metal); glass; wood

Dimensions

length 274mm; breadth 165mm; height 237mm; bubble level length 84mm; breadth 15mm; height 18mm box length 314mm; breadth 193mm; height 178mm

Special Collection

Provenance

Purchased from Saul Moskowitz Historical Technology Inc., Masssachustts, USA, 07/1980.

Inscription

‘Lenoir à Paris ‘ (on circle strut)
‘L.T.’ (on circle strut)

Description Notes

Graphometer, by Lenoir, French, 1775-1800.

Brass semi-circle pierced and divided 0 - 180 in both directions numbered by 10 subdivided to 30’. Telescope mounted on pivot on vernier plate which reads scale to 1’ of arc. Clamp and slow-motion screw. Sliding eyepiece focus. Second telescope mounted below semi-circle in rectangular frame. Pivoting. Sliding eyepiece focus. Clamp and slow motion screw for azimuth measuring. Ball and socket joint with winged clamping screw for attachment to tripod. Separate spirit level. Fitted wooden box.

Condition good; complete

References

Events