144 RECORD OF SCIENCE FOR 1886. 



tions of Jupiter and of double stars Lave been made with the equato- 

 rial during 188G, and the necessary observations for furnishing time to 

 the city of Chicago have been made with the meridian circle. A cata- 

 logue of two hundred and nine new double stars has been sent to the 

 Nachrichten. It is expected that observations of double stars, Jupiter, 

 and the satellites of Uranus will be kept up during the coming year. 

 The instruments of the observatory are valued at $30,000. There is 

 no permanent endowment, and Professor Hough carries on his work 

 without assistants. 



Deutz (1885). — Herr Emil Mengeriug established in 1884 a private 

 observatory, the principal instrument being a 5-inch refractor by Eeiu- 

 felder «& Hertel. Physical observations of the moon and Jupiter have 

 been made, and attention is being directed to astronomical photography 

 and spectroscopy. Approximate geographical position : Latitude, +50° 

 56' 33" ; longitude, +0^ 25'" 45».0 west of Berlin. 



Dresden (1885). — At Baron von Engelhard t's observatory observa- 

 tions were made of comets, nebulae, double stars, the phenomena of Ju- 

 piter's satellites, occiiltations by the moon, etc. 



Dresden (1885) — Dr. Drechsler, of the " Mathematischer Salon," con- 

 tinues a series of meteorological observations begun in 1828. 



DUsseldorf {1S85). — Since 1S47, 1,271 observations of 157 asteroids 

 have been made. 



FranJcfort-o7i-theMain {ISSo). — Herr Epstein continues his star-gauges 

 and his observations of sun-spots. 



GeTieva (1885). — Four hundred and ninety-eight chronometers were 

 tested during 1885, some of them showing an uncommon degree of ex- 

 cellence. Forty-two chronometers were entered on December 1, 1885, 

 for a twelve- weeks' special trial of temperature compensation. M. Kam- 

 mermann has employed the 10-inch equatorial in observations of com- 

 ets, nebulae, and satellites. Meteorological observations are continued 

 as in former years. 



Gotlia (1885). — Dr. Becker has given up the greater part of his time 

 to the reduction of his zone observations. The equatorial which has 

 received anew 4^-inch objective by Reinfelder & Hertel, and has been 

 thoroughly rejjaired, was remounted in October. A series of observa- 

 tions was made with the meridian instrument. 



Greenwich (1886). — The annual report of the astronomer royal, Mr. 

 Christie, was submitted to the board of visitors of the Greenwich Ob- 

 servatory on June 5, and gives an account of the progress and activ- 

 ity of the observatory for the year ending May 20, 1886. The regular 

 work of the transit circle and the altazimuth has been continued, and 

 very satisfactory results have been obtained with the apparatus for de- 

 termining absolute personal equations brought into use with the former 

 instrument some months ago. Spectroscopic observations include a 

 considerable number made of the new star which burst out in the great 

 nebula of Andromeda. The spectroscopic observations of Sirius indi- 



