CECIL E. HANSON COLLECTION
ANTIQUE SURVEYING INSTRUMENTS

FOREIGN TRANSITS AND THEODOLITES

Maker Unknown - France, ca mid 19th century*

Serial Number:
Type: Graphometer - Semi Circle
Telescope Length:
Diameter of Horizontal Circle:
Needle Length:
Diameter of Vertical Arc:
Height:
Weight:
Box: No
Condition: Good
Found: 1966 - Paris, France
CEH Inventory# FT22

*CEH estimate

CEH notes - Invented by Philip Danfrie of Paris about 1597. Remained the basic surveying instrument until the close of the 18th century.