TEKRESTRIAL MAGNETISM. 



Dip. 



Epoch of 

 commencing 

 vibration, 

 hrs. min. sec. 



Duration 





Calculated 



of 500 



II 



duration 



vibra- 



at 60°. 



tions. 



H "- 





Square of the 



Horizon- 



Total in- 



preceding. 



tal inten- 



tensity : 





sity. 



hor. be- 

 ing 1000. 



Total inten- 

 ity : that at 

 Cincinnati 

 = 1000. 



144. Locke's MiUs, Maine.— Lat. 44° 23' 34" N. Long. 70° 44' W. June 15, 1845. 



75° 50' 40" 

 Var. 12 08 00 W, 



3 50 02.4 P 



1302.4 



77.5 



1300.92 



5 23 01.6 



1583.2 



71.0 



1582.00 



4 48 01.2 



1577.2 



74.0 



1575.26 



16923928464 



25027240000 



24814440676 



Mean 



728.60 

 725.32 

 725.74 

 726.55 



2970.9 



994.96 



145. Charles R. Locke's, in Bethel, Maine— Lat. 44° 27' 46" N. Long. 70° 51' W. 

 June 10, 1845. 



75° 51' 

 Var. 11 50 W. 



5 11 05.2 P 



1304.0 



85.0 



1302.00 



16952040000 



727.40 



2975.5 



996.51 



146. Gorham, N. H.— Lat. 44° 27' N. Long. 71° 13' W. June 17, 1845. 



75° 33' 25" 4 7 55 02.4 A 1278.4 65.0 1278.00 16568323524 744.24 2983.9 999.32 



147. Mount Washington, White Mountains. — Lat. 44° 16' 34" Long. 71° 19'. June 

 18, 1845. 



75° 45' 



4 14 03.2 P 

 4 50 00.0 



1577.2 

 1572.4 



46.0 

 44.0 



1579.14 



j^^|jg|24936831396 



728.66 



2960.0 



991.5 



148. Camp on Mount Washington, about one mile westwardly from the summit. June 

 19, 1845. 



75° 50' 49" 5 2 44 01.2 P 1578.8 69.7 1577.73 24892319529|729.25 2981.6 



998.66 



149. Fabyan's Hotel, seven miles west of Mount Washington. — Lat. 44° 16' 15" N. Lon| 

 71° 29' W. June 20, 1845. 



75° 39' 54" 

 iVar. 11 32 00 W. 



7 



55 



02.0 A 



1298.0 



70.0 



1297.15 



9 



00 



04.8 



1573.2 



68.0 



1572.09 



9 



32 



03.2 



1568.0 



63.0 



1567 60 



16825981225 



24714669681 



24573697600 



Mean 



732.85 

 734.46 

 732.85 

 733.39 



2960.3 



991.41 



REMARKS. 



144. Locke's Mills, Maine. — Geology : deep drift, filled with large bowlders of granite and gneiss rocks, 

 gravel, and sand, forming what is known by the name of " Pine plane." Mountains in the neighborhood, 

 gneiss and granite, from 2000 to 3000 feet high. 



145. Charles R. Locke's, in Bethel, Maine. — Geology: on the fertile alluvion of Sunday River; gneiss 

 and granite at unknown depths, and in the adjacent hills and mountains. 



146. Gorham, N. H. — Locality : at the bend of the Androscoggin, and near to the White Mountains. 

 Geology: a mass of small bowlders and gravel; gneiss and gravel below. 



147. Mount Washington, White Mountains. — Geology : gneiss rock, broken at the surface into a pile 

 of huge angular masses, but solid and in place below. 



148. Camp on Mount Washington. — Geology: gneiss rock of Mount Washington. 



149. Fabyan's Hotel. — Geology : alluvion of the Amonoosuc River. 



