One ten inch flint glass prism of angle 12 1/2 degrees

Made:: 1888-1889 in London

maker:: Adam Hilger

One ten inch flint glass prism of angle 12 1/2 degrees [mounted with Inv No. 1888-158 and shares the same case] with brass mountings and adjustments to minimum angle divation. Used with a 10-inch refracting telescope with equatorial mount by Cooke at the South Kensington Solar Physics Observatory and is now at the Norman Lockyer Observatory at Sidmouth, Devon

Details

Category:: Astronomy

Object Number:: 1889-68

Materials:: glass and brass

type:: spectroscope - objective prism

credit:: Hilger, Adam

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Parts

Case for one ten inch flint glass prism

Case for one ten inch flint glass prism of angle 12 1/2 degrees [mounted with Inv No. 1888-158] with brass mountings and adjustments to minimum angle divation in case. Used with a 10-inch refracting telescope with equatorial mount by Cooke at the South Kensington Solar Physics Observatory and is now at the Norman Lockyer Observatory at Sidmouth, Devon