ASTRONOMY. 187 



niomitcd. This refractor fjave place to one of 4.} iiiclies apertiin^ in 

 1S72, and in 1874 a farther addition was made to the buihlings. 

 In 187!) a substantial observatory of bri(;k was erecited a few yards 

 southwest of tlie okl buihlinf^. It consists of an equatorial room 

 (under which is an office) and meridian and prime vertical rooms, the 

 meridian room containing a Cooke transit, mounted in 1879. In 188LJ 

 an 8-inch Grubb eciuatorial sui)planted the 4i-inch. Mr. Tebbutt has 

 publishe<l many valuable observations of comets, asteroids, double and 

 variable stars, occultations of stars by the moon, etc., during the more 

 than twenty- five years' existence of his observatory. 



Wolsinfjham. — Kev. T. E. Espin has continued his sweeps for red stars 

 and stars with remarkable spectra, and has announced the discovery of 

 several new variables. A 4.8- inch Trouyhton & Simms eqatorial has 

 been added to the equipment, and a new edition of Birmingham's red 

 star catalogue has been published. In the latter part of 18S8 the ob- 

 servatory was removed to a new site at Towlaw, Darlington, 3 miles 

 northeast of its okl position and 1,000 feet above sea-level. 



Yale. — The initial volume of "Transactions of the Astronomical Ob- 

 servatory of Yale University," a valuable memoir by Dr. W. L. Elkin 

 upon the relative positions of the principal stars in the Pleiades, as de- 

 termined with the new heliometer, was publisheci in 1887, the expense 

 of printing having been borne by Professor Loomis. Upon the comple- 

 tion of this work Dr. EUijn took up the investigation of the parallaxes 

 of the ten first-magnitude stars in the northern hemisphere, and the re- 

 sults obtained we have already referred to under stellar parallax. The 

 heliometer has also been used for measures of various double stars and 

 of the diameters of the sun and Mars, and more recently in a triaugu- 

 lation of twenty-four stars within 100' of the north pole, and in ob- 

 servations of Iris for the determination of the solar parallax. Mr. Hall 

 has nearly com})leted the reduction of his work upon Titan, the expense 

 of which is defrayed by the Bache fund, and he has taken up the in- 

 vestigation of the parallaxes G B Cygni and Lalande 18115, 22. Mr. 

 O. T. Sherniiin, who had charge of the thermometric bureau, resigned in 

 November, 1880, and his work has since been carried on by Mr. Peck. 

 The testing of time-pieces has been discontinued, but the time-service is 

 still maintaiiu'd. The subs(!ription of •'j!l,()0() annually for the suj)port of 

 the work with the heliometer has been renewed for three years, begin- 

 ning with 1887. 



Zacatecas (.1/ex/po).— Latitude +22° 46' 34."9, longitude 0'' 50"' 17.''5 

 west of Greenwich ; altitude 2,475'" (?). Instnunents : Kcpiatorial of 

 French inches aperture with astronomical and ])hotographic objectives, 

 a small transit, altazimuth, <;lock, chronometer, spectroscope, aiul me- 

 teorological aj)paratus. Director, Ingeneiro Jose A. y Bouilla. 



Zurich (1880). — Dr. Kudolf Wolf has continued his observations of 

 sun-spots. 



