696 EEPORTS OF ASTRONOMICAL OBSERVATORIES. 



(e) Photometer : Airy's double-image micrometer ; makers, Trough- 

 ton & SIMMS. 



(/) Chronograph : maliers, E. Dent & Co. 



(g) Clocks: one mean time; makers, Shepherd & Son: one sidereal; 

 makers, E. Dent & Co., Hardy, Arnold, Graham. 



(h) Chronometers : mean time ; makers, various. There are always on 

 hand a large number rated for the navy ; some of these are used when 

 necessary for the Observatory. Sidereal ; none of accurate character. 



(i) Miscellaneous : Photoheliograph ; maker, Dall]MEYER ; aperture of 

 objective, 4 inches. Several portable telescopes ; aperture, 4 inches to 

 2f inches. Five other 6-inch equatorials (packed in cases) returned 

 from Transit of Venus Expedition, 1874. Five 3-inch j^ortable transits 

 by SiMMS ; one 14-iuch alt-azimuth by Simms ; three 14-inch altitude 

 instruments by Simms ; four i^hotoheliographs by Dallmeyer (all re- 

 turned from the Transit of Venus Expeditions, 1874). 



Observations during the past year and work proposed 



FOR the coming YEAR (1881) : 



On all the points mentioned here very full information will be found 

 in the " Introduction to the Greenwich Observations" and in the "As- 

 tronomer Eoyal's Eeport to the Board of Visitors ". 



Principal publications of the Observatory' during the 

 YEAR 1880 : 



The following are included in volume of Greenwich observations and 

 also imblished separately : Greenwich observations for 1878, published 

 in London (H. M. Stationery office), 884 pages; Astronomical results; 

 Spectroscopic and photographic results ; Magnetical and meteorological 

 results ; Introduction to Greenwich observations ; Rates of chronome- 

 ters on trial for jjurchase, 1879 ; Report of Astronomer Royal to board 

 of visitors, 7 June, 1879 ; Spectroscopic and photographic results, 1879. 



Halifax, England. 

 Bermerside Ohscrvafory, Slircoat. 



Longitude from Greenwich, ~ 

 Latitude, — 

 Director: — 



? 



Hamburg, Germany. 

 Sternwarte. 



Longitude from Greenwich, 39™ 53«.7 E. 

 Latitude, 53^ 33' 1" K 



