VOL. LII.] ' PHILOSOPHICAL TRANSACTIONS. 56l 



both the entrance and exit of Venus, with telescopes of 32 and 20 feet focal 

 lengths. The principal times observed were as follow : 



Exterior contact Interior contact Interior contact Total exit, 



at the entrance. at the entrance. at the exit. 



Lagerborn 3^ 45"" 44'' 4^ 4™ 1* g^ 54"^ 22* lO** 12™ 18» 



Hellant 3 45 51 4 3 59 9 54 8 10 12 22 



Mr. Hellant is esteemed a very good observer. The difference between the 

 meridians of Paris and Torneo is computed to be l** 27"" 28*, very nearly. 



At Abo, the capital of Finland, situated in latitude 6o° 27', longitude east of 

 Paris 1^ 19™ 17', Mr. Justander observed with a telescope of 20 feet; 



The interior contact, at the entrance, to be at ... . 3'' 55"^ 50' 



Beginning of the exit, at 9 46 59 



Total emersion, at 10 4 42 



At Hernosand, a city in Sweden, in latitude 6o° 38' and longitude l** 2" 12* east 

 of the meridian of Paris, Messrs. Gister and Strom «, bserved, with telescopes of 

 20 feet. 



Mr. Gister . . ^ ^ » 3^ 38™ 26' 9*^ 29"" 21* 9* 46"" 40' 



Mr. Strom . . 3 20 40 3 38 35 9 46 47 



At the observatory at Upsal, Messrs Stromer, Metlander Mallet, and Berg- 

 man, made the following observations, with three telescopes of 20 feet, and a 

 reflector of 18 inches. The difference of meridians between Upsal and Paris is 



Mr. Mallet 3^ 20'" 45« 3^ 37"^ 56^ 9*^ 28™ 3« Q^ 46™ 29« 



Mr. Stromer 3 38 5 9 28 7 9 46 13 



Mr. Bergman 3 37 43 Q 28 9 9 46 30 



At Lund in Scanie, Mr. Schenmark observed, with a telescope of 21 feet, the 

 interior contact of the exit was 9*^ 10™ 44% doubtful, being cloudy; total emer- 

 sion 9^ 29™ 14^ This city is 43' 50* to the east of the meridian of Paris. 



According to the observations made at the observatory at Stockholm, by Mr. 

 Klingenstiern and Mr. Wargentin; 



Mr. Klingenstiern . . ^ ™ •3'^ 39™ 29' 9^ 30™ 1 1 » 9*^ 48™ 8^ 

 Mine 3 21 37 3 39 23 9 30 8 9 48 9 



The difference of meridians between Paris and Stockholm is 1 2™ 50* or 52* at 

 most. 



In these observations, Mr. W. made use of an excellent telescope, of 21 

 Swedish feet, and Mr. Klingenstiern observed with one of Mr. Dollond's tele- 

 scopes, of 10 feet, with an eye-glass fitted to it, which magnified the object 

 more than 140 times. 



VOL. XI. 4 C 



