ASTRONOMICAL OBSERVATIONS 



603 



OBSERVATIONS AT TEPLITZ BAY OBSERVATORY 



Latitude 



Latitude was determined by observing star altitudes in the meridian. These observations 

 and results are summarized in the following tabulation : 



Latitude observations at Teplitz Bay 



Local 

 mean date 



1905 

 April 11.38 



Star 



f Ursse Majoris 



Polaris 



u Bootis 



P Ursse Minotis 



Circle 



Mean of vertical 



circle readings 



corrected for level 



E 

 E 

 W 

 W 

 W 

 W 



w 



E 

 E 

 E 

 E 

 E 

 W 

 W 

 W 

 W 

 E 

 B 



154 38 12.9 



154 38 35 

 205 15 57 

 205 16 24 

 170 32 54 

 170 32 54 

 170 32 53 

 189 21 13 

 189 21 08 

 189 21 07 

 117 51 26 



117 51 39 

 242 02 19 

 242 02 31 

 187 12 08 

 187 12 05 



172 41 33 

 172 40 37 



Barom- 

 eter 



In. 

 30.805 



30.770 



30-755 



Attached 



ther- 

 mometer 



°F 



+54-5 



+45 o 



+42.5 



Outside 



ther- 

 mometer 



°F 

 +4.0 



+4.0 



+4.0 



-f-7.0 



+7.0 



+7.0 



+6,0 



4-6.0 



-i-6.o 



-1-6.0 



4-6. o 



4-6.0 



4-6.0 



+4.0 



+40 



4-4.0 



4-4,0 



4-3-0 



Adopted mean value for latitude . 



Resulting lati- 

 tude 



o / // 



81 47 34 4 N 



■ 81 47 35.4 N 



1- 81 47 33-3 N 



81 47 36-3N 



81 47 34.9 N 



The mean value for latitude resulting agrees closely with that determined by the Italian 

 Expedition. The Italian astronomical station was not relocated. Direct comparison of values 

 may, however, be made by reference to the magnetic station of 1899 to 1900 which is 136.42 

 meters, or 4.4 seconds of arc, south of the Ziegler Expedition astronomical observatory and i.i 

 second'of arc south of the astronomical station observed at by the Italian party. Their finally 

 adopted latitude was 81° 47' 26."2,* which referred to the station of 1905 would be 81" 47' 

 2Q "5 ; the two determinations thus agree within less than six seconds of arc, the mean of the 

 two being 81° 47' 32."2- 



*Osservazioni scientifiche esequite durante la spedizione Polare di S. A, R. I,uigi Amedeo di Savoja, 

 Duca degli Abruzzi. Milan, 1903. Pp. 105 and 447. 



