Casting a telescope mirror, 1866

Casting a telescope mirror, 1866

R102/0194 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.5MB

Downloadable file size: 4.4MB

Price image Pricing

Please login to use the price calculator


Caption: Casting a telescope mirror. This illustration, Casting the speculum metal mirror of the Great Melbourne Telescope (1866), depicts workers at Grubb's works, Dublin. They are casting the mirror by heating the metal in the furnace at right, then lifting it in a pot to the tilting apparatus at lower centre. It will then poured into a circular mould and placed into the annealing furnace at the back of the room. Annealing is a heat treatment that alters the microstructure of a material. The Great Melbourne Telescope remained the largest equatorially mounted instrument for several decades after its completion in 1868.

Release details: Model release not required. Property release not required.

Keywords: 1800s, 1866, 19th century, adult, annealing, apparatus, artwork, astronomical, astronomy, black-and-white, casting, casting the speculum metal, circular mould, dublin, equipment, europe, european, factory, furnace, glass, great melbourne telescope, grubb telescope company, grubb works, grubb's works, grubbs' works, historical, history, history of, history of science, illustration, industrial, industry, instrument, ireland, irish, metal, mirror, mirror of the, monochrome, onlookers, speculum, technological, technology, telescope, tilting, worker, workers

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.