LIST OF ILLUSTRATIONS

PAGE
Flamsteed, the First Astronomer Royal[Frontispiece]
The New Building[7]
General View of the Observatory Buildings from the New Dome[12]
Flamsteed's Sextant[36]
The Royal Observatory in Flamsteed's Time[44]
The 'Camera Stellata' in Flamsteed's Time[52]
Edmund Halley[61]
Halley's Quadrant[69]
James Bradley[72]
Graham's Zenith Sector[77]
Nathaniel Bliss[83]
Nevil Maskelyne[87]
Hadley's Quadrant[91]
John Pond[96]
George Biddell Airy, Astronomer Royal[103]
The Astronomer Royal's Room[110]
The South-east Tower[115]
W. H. M. Christie, Astronomer Royal[121]
The Astronomer Royal's House[127]
The Courtyard[130]
Plan of Observatory at Present Time[134]
The Great Clock and Porter's Lodge[147]
The Chronograph[158]
The Time-desk[164]
Harrison's Chronometer[165]
The Chronometer Room[167]
The Chronometer Oven[171]
The Transit Pavilion[174]
'Lost in the Birkenhead'[179]
The Transit Circle[189]
The Mural Circle[195]
Airy's Altazimuth[208]
New Altazimuth Building[211]
The New Altazimuth[213]
The New Observatory as seen from Flamsteed's Observatory[219]
The Self-registering Thermometers[235]
The Anemometer Room, North-west Turret[240]
The Anemometer Trace[243]
Magnetic Pavilion—Exterior[246]
Magnetic Pavilion—Interior[248]
The Dallmeyer Photo-heliograph[254]
Photograph of a Group of Sun-spots[259]
The Great Nebula in Orion[269]
The Half-prism Spectroscope on the South-east Equatorial[273]
The Workshop[276]
The 30-inch Reflector with the New Spectroscope attached[278]
'Chart Plate' of the Pleiades[286]
The Control Pendulum and the Base of the Thompson Telescope[289]
The Astrographic Telescope[291]
The Driving Clock of the Astrographic Telescope[294]
The Thompson Telescope in the New Dome[297]
The Nebulæ of the Pleiades[300]
Double-star Observation with the South-east Equatorial[308]
The South-east Dome with the Shutter Open[314]

GENERAL VIEW OF THE OBSERVATORY BUILDINGS FROM THE NEW DOME.
(From a photograph by Mr. Lacey.)