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K. 1964, Results of Observations with the Six-Inch Transit Circle 1956-1962, U. S. Naval Observatory Publications, 2nd Series, Vol. XIX, Part II 58. Hughes J. A. & Scott D. K. 1982, "Results of Observations with the Six-Inch Transit Circle 1963-1971," U. S. Naval Observatory Publications, 2nd Series, Vol. XXIII, Part III Observatory Instrument Years Used Aperture Focal Length (cm) (cm) Berlin von Pister Transit 1839-1842 12 161 Besancon Gautier Transit 1890-1937 19 240 Cambridge Cambridge Transit 1828-1869 12.7 305 Cape of Good Hope Old Transit 1884-1892 20.6 353 Cape of Good Hope New Transit 1907-1959 15.3 244 Edinburgh Edinburgh Transit 1838-1845 16.3 253 Nice Nice Transit 1889-1911 20 320 Dominion Obs. Ottawa Transit 1923-1935 15.3 213 Oxford (Radcliffe) Oxford Transit 1840-1861 10.2 244 Oxford (Radcliffe) Carrington Transit 1862-1899 12.7 168 Paris Paris Transit 1800-1803 9 125 Paris Fortin Transit 1804-1853 11 250 Paris Gambey Transit 1843-1906 15 240 Paris Grand Transit 1863-1925 23.6 385.2 Paris Cercle du Jardin 1879-1933 19 232.4 Paris Lunette Gautier 1935 7.5 84 Paris Lunette Bouty 1935-1936 10.2 123 RGO Halley Transit 1750-1815 4.1 244 RGO Pond Transit 1816-1850 12.7 305 RGO Great Transit 1851-1954 20.6 353 Strassbourg Repsold'che Transit 1882-1893 16.0 188.8 Tokyo Gautier Transit 1949-1962 20 310 Toulse Gautier Transit 1909-1924 19.6 234.8 Uccle Cercle de Respold 1928-1944 1.60 195 USNO USNO Transit 1861-1865 12.3 198 USNO 9" Transit 1894-1945 21.4 367.5 USNO 6" Transit 1899-1969 15.3 198