730 PROGRESS OF ASTRONOMY FOR 1891 AND 1892. 



offered to the public in Boston tlirouiili tlic Western Union Telegr;ii>li 

 Conii)any at a lower rate than they conkl be furnished by the Har\ard 

 Observatory. 



Hathorn (Saratoga S]>rings, N. Y.): del (UyrraJ. — Physical observa- 

 tions ot Jupiter with a 0-inch telescope. 



Haverford College: Learcnworth. — Work on stellar ])inallax; 

 sun-spot observations. 



HEiDELBEiKi : Wolf. — Stellar ])liotography, i)hotoinetric observa. 

 tious. Prof. Wolf has l)een very successful in the discovery of n<'w 

 asteroids by photography. 



Hereny: von Gothard. — Spectroscopic researches; photography of 

 uebuL^e; observations of variable stars: meteorological observations; 

 time service, and computations of asteroids. 



Hongkong: Dohercli. — Time service; meteorological and magnetic 

 ol)servatious. 



Iowa Uneversity: Weld. — A student's astronomical observatory 

 has recently been established at the State University of Iowa, Iowa 

 City, under the direction of Prof. L. G. Weld. The main building is 12 

 feet square, capped by a cylindrical turret in which is mounted a 

 Clrubb equatorial of 5 inches aperture, and 77^ in(?hes focal length ; a 

 Wiirdemann transit of 1| inches aperture and 24inches focus is mounted 

 in a wing 10 by 12 feet. Subsidiary apparatns consists of a -kinch 

 portable Fitz equatorial, clock, chronometer, aud chronograph. 



Jackson (Mich.) — Small private observatory of Mr. U. W. Lawton. 



Jena : Knopf. — The observatory was founded in 1812 by the Grand 

 Duke of Saxe- Weimar. Observations of comets, occultatious, phenom- 

 ena of Jupiter's satellites, variable star observations; time service; 

 meteorology. A new equatorial of 20 centimeters (7.9 inches) aperture 

 and 3 meters (9.8 feet) has been installed. 



Kalocsa : Fenyi. — Solar and meteorological observations, 



Kenwood: Hale. — The Kenwood Physical Observatory, the private 

 observatory of Prof. George E. Hale, had its inception in a spectro- 

 scopic laboratory erected in Chicago in the summer of 1888. The 

 addition of a tower and wing during the winter of 1890-'91 brought 

 the building to its present form, and it now includes a reception room, 

 library, equatorial room, ''slit room," "grating room," photographic 

 <lark room, general laboratory, and workshop. The grating room 

 contains a 4-inch concave grating of 10 feet radius of curvature, 

 mounted in the manner employed by Prof, Rowland. A shorter 

 girder allows the use of a grating of only 5 feet radius in cases when 

 the light source is too faint to admit of the highest dispersion. Sun- 

 light is furnished by a heliostat on a pier some distance to the north 

 of the building. Electrical power is supplied through a gas engine 

 and storage battery and also from the main city wires. 



The mounting of the equatorial was finished in March, 1891, by 

 Warner and Swasey, aud the excellent 12.2-inch object glass, figured 



