174 liECOKD OF SCIENCE FOR 1887 AND 1888. 



altazimuth, and of comets wijth the et]iiatorial. The spectroscopic ob- 

 servatious for determiiiiiig tlie motions of stars in the line of sight, the 

 photoheliographic record of the sun's surface, the magnetic and meteoro- 

 logical observations, the chronometer and time service are also contin- 

 ued as heretofore. A crown disk for the 28-inch objective, has, after 

 several failures, been obtained by Grubb from Chance & Co., and the 

 Treasury has granted the necessary funds for a 13 inch photographic 

 telescope to enable the observatory to take its share in the scheme for 

 forming a photographic map of the heavens. Numerous experiments 

 have been made in stellar photograpiiy in preparation for this work. 

 An 18-foot dome for a photi)graphic equatorial was built in 1888, and 

 at the same time an addition was made to the space available for com- 

 l)uting rooms. The annual volume for 1886 has been printed aiid dis- 

 tributed. We learn that provision has been made for a redetermina- 

 tion of the difference of longitude between Greenwich and Paris. The 

 astronomer royal in his last report draws attention to the recently 

 averted danger from ai proposed railway tunnel within 810 yards of the 

 observatory. He also points out the inadequacy of the present staff to 

 handle properly the ever increasing amount of work demanded fioni a 

 national observatory, as new fields of research are opened up for in- 

 vestigation. 



Grif/non. — Sketches of the planets, observations of meteors, meteoro- 

 logical observations, and microscopical studies of cosmi(;al dust. Di- 

 rector, Fr. Mayeul Lamey. 



Grinnell. — Iowa College has a small observatory, for instruction, with 

 an Sinch Clark refractor, mounted in April, 1888. 



Guadalajara (Mexico). — Piivate observatory of Ingeneiro Carlos F. de 

 Landero; latitude, + 20° 40' 31".9; longitude, 6^' 53'" 23^00 west of 

 Greenwich. 



Haiphong (Tonlcin). — The longitude of the small observatory as tele- 

 graphically determined by connection with Hong Kong April 5, G, 7, 



1887, is 1^ 6'" 44^04 east of Greenwich. 



Harrow. — The work of determining the places of conqiarision stars 

 and other selected small stars has been continued with the meridian 

 circle. Observations of comets have been made with the equatorial. 



Harvard. — Professor Pickering describes the progress of his work 

 under three principal heads : The older instruments of the observatory, 

 the Draj)er memorial, and the Boyden fund. The 15-inch equatorial has 

 been used upon comets, eclii)ses of Jupiter satellites, and photometric 

 observations of asteroids. The meridian circle zone catalogue is pass- 

 ing through the press, ami some progress has been made in observing 

 the new zone, —9° 50' to — 14o ic The work upon which the meridian 

 photoQieter has been employed since 1882 was finished September 29, 



1888. The most laborious part of this work was the determination of 

 the brightness of stars of the ninth magnitude in zones 20 minutes in 

 ■width at intervals of 5 degrees from the north pole to the declination 



