460 ASTRONOMICAL OBSERVATORIES. 



tion of the wind aud rain. These apparatus, some mechanical and a 

 few electric, are in duplicate, so that there may be no interruption of 

 the observations if one of them should be out of order. The Secchi 

 meteorograph is complete. 



(4) neliophotometer(CRAVERi),nefoscope (Braun), termoheliometer 

 (Mary Devy), pyroheliometer (Puillet), pliotometor, cyauometer 

 Arago polarimeter, for direct atmospheric observations, 

 (c) Magnetic division : 



(1) Declinometer, inclinometer, inclination balance for observing the 

 variations in the intensity and direction of terrestrial magnetism. These 

 apparatus are constructed according to the method of Gauss. 



(2) Inclination compass and magnetic theodolite (Brunner) for mak- 

 ing exaict observations of terrestrial magnetism. 



{d) Division of geodynamics and atmospheric electricity: 



(1) An instrument for microseismic observations. 



(2) A Eossi seismograph for observing the motions of earthquakes. 



(3) A Secchi seismograph for analyzing the motions of eartliquakes. 



(4) Galvanometer for the daily observations of the telluric current. 



(5) Palmieri electrometer with movable conductors; a Boenghar- 

 TEN electroscope for making observations of the atmospheric electricity. 



Pekin, China. 



Observatory of the Imperial Russian Embassy. 



Longitude from Greenwich, 7'' 45"' 5G'' E, 



Latitude, 39° 54' 13" X. 



Authority for longitude and latitude: WuRM, 1845. In Conuaissance 



des Temps, 1884, p. xli. 

 Director: . 



Pisa, Italy. 



Observatorio. 



Longitude from Greenwich, 41"' 3G« E. 

 Latitude, 43° 43' 5" N. 



xYnthority for longitude and latitude: iNlARlENi, 18G1. In Conuais- 

 sance des Temps, 1884, p. xxxiv. 

 Director: . 



Plonsk, Russia. 



Private Observatory of Dr, J. Jedrzejewicz. 



Longitude from Greenwich, 1'' 21"' 32"* E. 



Latitude, 52° 37' 40" N. 



Authority for longitude and latitude: A. Lancaster, Liste G^n^rale 



Observatoires et Astrononu\s, 1887. 

 Director : Dr. JiiiDRZEJEWicz. 



