ASTRONOMY. 1 75 



— lM)^. This iiistniiiieut li;is bccu disiiiouiited and sent to Peru, where 

 the work will be continued to the south pole, and in order to extend tlie 

 investigation from stars of the ninth to stars ot the fourteenth magni- 

 tude, an instrument of somewhat similar form but with an objective of 

 12 inches aperture (described under Instruments) has been mounted at 

 Cand)ridge. 



Tiie first extensive research undertaken witli the HiMiry Draper me- 

 morial funds, a catalogue of the spectra of 10,875 stars, covering the en- 

 tire sky north of — Uo'^, is nearly completed. This work has been done 

 with the 8-iuch Baclie telescope. A second series of photographs made 

 with longer exposures, and so taking in fainter stars, will soon be liii- 

 ishe<l, and this instrument will likewise be sent to Peru, where the ob- 

 servations will bo extended to the south pole. The detailed study of 

 the brighter stars with the 11-inch Draper telesco[)ehas been continued, 

 and the loinch and 28-incli retlectors constructed by Di'. I)ia])i^r have 

 been mounted and are employed in studying the spectra of variables. 



The Bo3'den fund has been devoted to collecting necessary* informa- 

 tion in regard to the meteorological conditions at high altitudes, and in 

 furtherance of this object several stations in Colorado wei'e occui)ii'd 

 during the summer of 1887 by a party from the observatory provided 

 with special i)hotographic api)aratus. In December, 1888, a fully 

 e(piii>i)ed expedition went out to Caliibrnia to observe the total solar 

 eclipse on January 1, ISSO, and having successfully completed that task, 

 they proceended to the southern hemisi)here to occupy for several years 

 an elevated station in i*eru, and to carry out the i)hotogra[)hic and 

 photometric work mentioned above. 



Tiie compilation of observations of variabk^ stars, the telegraphic 

 announcement of astronomical discoveries, and the time service have 

 been continued as in previous years. Volume 18 of tln^ Annals is issued 

 in parts in order to piovide prompt publication for special investiga- 

 tions. Tiiese, as well as the Draper-memorial Peports, have received 

 notice elsewhere. The Pulletin of the New England Meteorological 

 Society an<l a good deal of other meteorological work will also ai)peair 

 in the Annals. The observatory buildings have been increased by the 

 addition of two m;ighboring houses, and also by the erection of small 

 detached and inexpensive buildiugs to cover the different telescopes 

 that have. been added to the equipment. 



JIarerJ'ord. — Founded in 1S32, enlarged in 1883. Instruments: 10- 

 inch refractor, by Clark; 8|:-inch refractor, re-ground, by (Jlark; 8| iiu^h 

 silver-on-glass reflector; l.=J-inch zenith telescope. Directors: Joseph (}. 



Harlan, 1853; Samuel J. Gummere, ; Samuel Alsop, jr., 1875; Isaac 



►"^harpless, 1882; Francis P. Leavenworth, 1887. Professor Leaven- 

 worth has published a number of observations of comets. 



Helshif/fors. — The 7-inch refractor has been used for observations of 

 comets, both determinations of position and (careful examination of 

 physical characteristics. The transit instrument has been re-modelled 



