364 A. D. Bache on a Magnetic Survey of Pennsylvania. 
No. Group If. { Latitude. Longitude. | Date. Observed dip. 
° ‘ 12) i ° U 
1 rmagh, 40 29 79 04 Aug. 1840 72 18°7 
2 | Fros gh, 9 41 78 56 “| 6 71 313 
3 ar Brownsville, | 39 59°5 79 478 we 71 535 
4 | Near Pittsburg, 40 28 79 595 ya. 72 32" 
5 | Economy, 40 37 80 16 et 72 35:0 
6 | Wheeling, 40 08 80 42 a. te 72 “ 
7 | Steubenville, 4o 25 80 39 cee 72 32° 
Mean, 4o 15°4 79549 | 1840" 72 13°2 
| No. Group UT. Latitude. { Longitude. Date. _Obeerved ‘dip. | 
i 
1 | Warren, hr 17 80 50 Aug. 1841 7 59°9 
2 | Mercer, 4.138 80 16 Od 72 572 
3 | Ashtabula Landing,) 41 54 80 47 “ 73 235 
4 rie, 42 07°5 80 06 a 73 466 
5 | Dunkirk, 42 29°3 79 23 cs 74172 
6 | Ellicottsville, 42181 | 7844 ne 74178 
7 | Berlin’s Tavern, 41 16 79 36 pated a 72 528 
Mean, 41 48-0 79574 | 18416 73 307 
| No. Group [V. Latitude, Longitude. ; Date. Observed dip. | 
eee , G7 ° fedt be 
1 | Curwinsville, 40 57°7 78 36 Aug. 1841 72 497 
2 | Belvidere, 42 13 78 06 ce 74 095 
3 | Bath, 42 20°8 77 21 A ie 
4 42 76 17 pope Ae 
5 | Silver Lake, 4t 566 76 02 * 
6 lk e, 4114 75 58 July -“ 
7 | Williamsport, 41 140 77 02 4 
8 | Bellefonte, ho 55 77 49 de he 
9 wistown, 4o 35 77 36 « 1840 
10 | Huntingdon, 40 30°5 78 02 
| Mean, Ai 24.5 77 16-9 1841 4 
No Group V. Latitude. Longitude. Date. 
1 | Niagara Falls, §3 04 79 05 Aug. 1843 
2 | Toronto Ob, 43 3g°5 79 21°5 “49 
3 | Rochester, 43 07 77 39 waa te 
ao44 42 53 77 02 July 
S48 se, 43 03 76 $9 * 
6 | Oswego, 43 26 76 3 Aug. “ 
Mean, 43 12.1 77 38-6 1843°6 
No. Group VI Latitude. Longitude. Date. 
I §3 05 75 14 July 1843 
| 2. | Schenectady, 42 3 57 ei 
3 ; 42 437 73 40°7 Aug. “ 
| 4 | West Point, 4t 23-4 73 57 July “ 
7) ew York, d I 3 56:3 Dec, 1841 
6 | Milford 4.19 74 51-5 Aug. ‘ 
7 Bushkill, 41 07 75 02 pie 
8 | Princeton, 40 20°7 74 396 July 1843 ) 
Mean, 41 416 | 74248 1842°9 ee 
 ® See Appendix No, 32, Coast Survey Report of 1856. This station was * 
owing to the numerous sinekveinia taken in this locality (at Lunatic Asylua 
Dip in 18413, 71° 410; in 18425, 72° 383, 
