Campbell-Stokes Heliograph Brass Glass Wood England 19th Century - Negretti & Zambra M/8845

Features

Age:  19th Century / 1801 - 1900

Origin:  Londra, England

Material:  Wood , Brass , Glass

Description

Campbell-Stokes heliograph, Negretti & Zambra, M/8845, made of brass and optical glass (sphere) and anchored on a wooden board. Our instrument can be dated with certainty between 1880 and 1885, as the first model was perfected by Sir George Stokes in 1880, who used a solid glass sphere and had the idea of using strips of paper to record burnt traces. Finally, in 1885, models were built in which the axis of the sphere could be tilted to suit various latitudes, a feature that the object described here does not possess.

Product Condition:
The object shows signs of wear due to age. It may require restoration. Any damage or loss is displayed as completely as possible in the pictures. Product with a Certificate of Authenticity and Lawful Origin.

Dimensions (cm):
Height: 18
Width: 20
Depth: 21