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The Buildings at Greenw1ch over i
Chapter3 The Principal Trans1t Instruments
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8-foot transit Abinger achromatic Altazimuth Altazimuth Pavilion aperture Astrographic Astron Astronomer Royal Astronomical Clocks Baily Bradley Bradley's brass building chronograph Chronometer Room collimation Comet Contemporary Accounts counterpoise Dallmeyer demolished Dent Description Figs diameter dismounted east Edward Troughton equatorial sector erected eye-end eyepiece feet fitted Flamsteed House Flamsteed's focal length G. B. Airy Graham Grubb Halley Halley's Herstmonceux Historical Summary horizontal inches Jonas Moore limb London longitude Magnet House Maskelyne measurement meridian Merz micrometer mounted movable moved mural arc mural circle Mural Quadrant object-glass Old Royal Observatory pendulum Peter Dollond photographic photoheliograph pier plate plumb-line polar axis Pond Quadrant Room reflector refractor roof Royal Greenwich Observatory screw sextant Shortt Shuckburgh shutters Sidereal Standard Sir Jonas Sisson solar star Thompson time-determination Towneley Transit Circle Transit Circle Room transit clock transit instrument Transit of Venus Transit Room Troughton & Simms vertical wire Zenith Sector Zenith Telescope