Piece of Green Granite Erbetta

PART OF:
Specimens showing results of a process
SMG00028414

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

License this image for commercial use at Science and Society Picture Library

License

SMG00028414
Science Museum Group
© The Board of Trustees of the Science Museum

Piece of green granite Erbetta. 1 of 5 specimens used to show the results of a process for polishing marbles, invented by A. Gath of Rome about the year 1825, and applied to reflectors for astronomical purposes.

Details

Category:
Astronomy
Object Number:
1870-18/2
type:
specimen

Related Objects

Film positive (9 7/8" x 7 3/4") Nebula N.G.C. 4594

Film positive (9 7/8" x 7 3/4") nebula N.G.C. 5866
One of of three platinotype prints of engravings in, 'Selenographia' by Johannes Hevelius, 1647 showing sunspots observed through a telescope. From page 519 and dated 3 May to 16 May 1644.

Drawing of sunspots, German, 28 October 1642.
Tokens used for branding equipment 'H.N.Irving'.

Tokens used for branding equipment 'H.N.Irving'
One of of three platinotype prints of engravings in, 'Selenographia' by Johannes Hevelius, 1647 showing sunspots observed through a telescope. From page 525 and dated 27 August to 8 October 1644.

Drawing of sunspots, German, 28 October 1642.
One of of three platinotype prints of engravings in, 'Selenographia' by Johannes Hevelius, 1647 showing sunspots observed through a telescope. From page 500 and dated 28 October to 6 November 1642

Drawing of sunspots, German, 28 October 1642.