One of two photographs showing a transit circle by Pistor and Martin at the U.S. Naval Observatory, Washington. One of two photographs showing a transit circle by Pistor and Martin at the U.S. Naval Observatory 1876
Brass transit circle by Dollond, engraved "Dollond London" with 1 extra magnetic needle 9 11/16" long, with two keepers, in box two eyepieces and a diagonal eyepiece, sliding dark glass; sliding Brass transit circle by Dollond 1800-1825
Cooke Reversible Transit Circle, manufactured by Cooke, Troughton & Simms Ltd, York c.1928 for the Royal Observatory, Greenwich. Used to measure positions of stars and planets at Greenwich (1933-post WWII), Herstmonceux (post WWII-1982) and Brorfelde Observatory, Denmark. Cooke Reversible Transit Circle 1925-1933
Photograph of a meridian circle by Repsold at Pulkovo Observatory, St Petersburg, Russia,. 1876. Photograph of a meridian circle by Repsold at Pulkovo Observatory 1876
One of nineteen photographs taken at the Royal Observatory, Cape of Good Hope, South Africa, showing the building with a shutter roof for the reversible transit circle by Cooke? One of nineteen photographs taken at the Royal Observatory 1909
One of nineteen photographs taken at the Royal Observatory, Cape of Good Hope, South Africa, showing the reversible transit circle by Cooke Photograph of reversible transit circle 1909
One of nineteen photographs taken at the Royal Observatory, Cape of Good Hope, South Africa, showing the Cooke (?) transit circle being reversed on its trolly. One of nineteen photographs taken at the Royal Observatory 1909