678 EEPORTS OF ASTRONOMICAL OBSERVATORIES. 



Cape Town, Africa. 



Royal Observatory^ Cape of Good Hope. 



Lougitudc from Greenwich, 1'' 13'" 55** E. 



Latitude, 33° 5G' 3".4 S. 



Antliority for longitude, Henderson ; for latitude, Stone. 



Directors: F. Fallows, 1820; 



T. Henderson, 1831 ; 

 T. Maclear, 1834; 

 E. J. Stone, 1870; 

 David Gill, 1879. 

 Assistants : W. H. Finlay ; 

 G. Maclear; 

 EoBT. H. Pelt; 

 I. Freeman. 

 Founded in 1820. Owned no instruments of importance until 1829. 

 It was not at this Observatory that John Herschel made his observa- 

 tions, but some distance from here on a private estate called Feldhau- 

 sen. 



Instruiments: 

 («) Meridian circle, by Eansome «& Simms for the engineering part; 

 Troughton & SIMMS for micrometric and optical part; a sister instru- 

 ment to the Greenwich circle ; diameter of circles, QQ inches ; divided 

 to 5'; read by G microscopes to O'.Ol estimating easily to O'.OOl as at 

 Greenwich. Aperture of objective, 8 inches; magnifying power always 

 emidoyed, 200 diameters. . 



(e) Equatorial instruments : makers, object-glass by Merz, mounting 

 (German form) by Troughton & Simms ; aperture of objective, 6.9 

 inches ; magnifying power of eye-pieces, 40 to 400. {&) Small equato- 

 rial, S.G-inch aperture (Dollard), 46 inches focal length, mounting on 

 long polar axis (English form), maker unknown ; without clock-work, 

 at present dismounted. 



{d) Spectroscope : spectroscope by Troughton & Simms. 

 (/) Chronograph : one by Bond, not at present in use. 

 {g) Cloelis: one mean time; maker, Molyneux: one sidereal; * maker, 

 Barraud. 



{h) Chronometers: mean time and sidereal. A supply of these instru- 

 ments kept for use of Her Majesty's ships, consequently frequently 

 changed. 



(^) Miscellaneous : A heliometer of 5 feet focal length, 4 inches 

 (French) aperture. Tube and cradle by Eepsold, mounting by Griibb. 

 (This instrument is the jjrivate property of Mr. Gill.) 



*Auew normal clock, with Airy's escapement and. air-tight case, is in course of 

 coustrnction by Messrs, Dent, 



