AT VAN RENSSELAER HARBOR. 21 



Term-pay Observations for Changes of Magnetic Declination at Van Rensselaer Harbor, 1854. 



Gilttingen 

 mean time. 



Fern Rock 



mean time. 



(toOm.) 



Fern Rock Observatory, January 18 and 19, 1854. 

 Readings taken 2™ 14'' earlier than indicated. 



lO'' 



11 



12 



13 



14 



15 



16 



n 



18 



19 



20 



21 



22 



23 

 

 1 

 2 

 3 

 4 

 5 

 6 

 7 



10 



BOS'! 



311.2 



320 



311 



320 



321 



329 



362 



330 



344 



346 



349 



356 



360.5 



336 



343 



33T 



342 



251 



115 



163 



268 



336 



314 



312 



305'' 

 313 

 314.8 

 30t 

 322 

 323 

 329 

 354 

 332 

 346.5 

 345 

 354 

 358 

 358 

 333 

 352 

 332 

 339 

 244.5 

 90 

 180 

 254 

 336 

 326 

 310 



305-1 

 314 

 315 

 309 

 319 

 323.3 

 330 

 353 

 335 

 345 

 345.5 

 359 

 359 

 355 

 330.5 

 350 

 328 

 329 

 240.5 

 89 

 193 

 240 

 336 

 332 



307<i 

 315.8 

 315.7 

 311 

 316 

 322.3 

 330 

 347 

 338 

 344 

 345 

 363.5 

 361.5 

 351.5 

 326 

 346 

 324 

 320 

 250 

 96 

 220 

 266 

 331 

 338 



308* 

 318.5 

 317 

 313 

 320 

 320 

 327 

 347 

 338 

 344 

 348 

 359.5 

 361 

 350 

 320 

 340 

 332 

 313 

 261 

 88 

 254 

 289 

 337 

 323 



312'! 

 317 

 320 

 315 

 320 

 319 

 336 

 346 

 340 

 345 

 347.5 

 351 

 355 

 349 

 320 

 348 

 336 

 300 

 254 

 85 

 290 

 297 

 337 

 318 



Sll-i.e 

 317 

 321 

 317 

 322 

 320 

 350 

 346 

 342 

 346 

 349 

 350 

 352.3 

 346 

 323 

 353 

 340 

 292 

 243 

 105 

 291 

 320 

 337 

 316 



312''.5 

 322.5 

 314 

 315 

 322 

 325 

 369 

 334 

 344 

 345 

 349.5 

 351 

 360.5 

 335 

 337 

 343 

 345 

 268 

 155 

 155 

 270 

 321 

 324 

 314 



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 " 



The series commences with readings 304'^, SOS-i, and 304'i, at 9'' 42™, 48", and 54° 



Fern Rook Observatory, February 24 and 25, 1854. 

 Readings taken 2™ 15^ earlier than indicated. 



10i> 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 

 

 1 

 2 

 8 

 4 

 5 

 6 

 7 

 8 

 9 



10 



The series commences with readings 290*, 288*, 282*, at 9'' 42", 48"", and 54™, 



Value of a scale division 0'.80. 



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



