AT VAN RENSSELAER HARBOR. 



23 



Gottinf^en 

 mean time. 



Fcrii Rock 



mean time. 



(to Om.) 



Fern Rock Observatory, May 26 and 27, 1854. 



Ruadiiiffs taken 1'" 34" earlier than indicated. 



10" 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 

 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 



4'' 3 



5 



6 



7 



8 



9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 







1 



2 



3 



4 



Observations commence at 9'' 24", scale readings 280*, 271*, 266*, 235*, 231*, 240*, corre- 

 sponding to gh 24", 30", 36", 42", 48", and 54" respectively. 



Fern Rock Observatory, June 21 and 22, 1854. 

 Readings taken 1" 34^ earlier than indicated. (Magnet suspended, I. 7.)' 



lOi" 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 

 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 



11 



4'' 37". 5 



5 " 



6 " 



7 " 



8 " 



9 " 



10 " 



11 " 



12 " 



13 " 



14 " 



15 " 



16 " 



17 " 



18 " 



19 " 



20 " 

 21 



22 " 



23 " 

 " 

 1 



2 " 



3 " 



4 " 



5 " 



Value of a division of the .scale 0'.80. 



Increase of scale readings denotes a movement of the north end of the magnet to the east. 



' This magnet I. 7 was undoubtedly used on all previous occasions. Mark reads on circle 338° 22', 

 circle reads 314° 12'. 



