12 



MAG S E TIC SUM E V < I 1 l' B N N S V L V A MA. 



Warren Ohio. In a field N. of town, under walnut tree, about | of a mile from American 



Hotel, and £ of a mile from brick house ( while). Centre bears S. 15£° E. 

 X. W. end of American Hotel bears S. 17|° E. 

 Wooden church (4 points), N. W. corner of steeple bears S. 15£° W. 

 512 paces from walnut tree to back of American Hotel. 



Ashtatmla Landing, Ohio. — Near the shore of the lake, 2 .J miles north from Ashtabula, under 

 an oak in a glen. 



Aug. 7 



0i* P. M. 



No. 1 

 No. 3 



Dip. 



73° 23'. 7 

 73 12.9 



Temp. Fahr. 



7 3°. 5 

 73.5 



JL>:]> uiieu luaded. 



h 



Dip reduced. 



Relative t-it-.u 

 Intensity. 



13° 47'.9 73° 24'.4 

 16 40.9 73 22.6 



1.1258 



1.1401 



Mean 



73 23.5 



1.1359 



Clear and warm, wind W. 



Erie, Pa.— Residence of Rev. Mr. Reid, in field about 40 feet to the S. E., near the road, 

 under elder bushes 



Aug. 9 



> ii' 



Temp. Fahr. 



Cylinder 

 Bar 



72°. 

 69.2 



No. of series. 



No. of Time of Corr'd. 



vibrations. 1" vibrations. 



450 

 430 



3G 3 .457 

 41.079 



36". 43*7 



41. 035 



Horizontal 



intensity 



I'lal. 1.0000. 



0.0102 

 0.8067 



rejected 



0.9102 



Nei die. 



Aug. 8 3"01 m P.M. No. 1 

 No. 3 



Dip. 



73° 4 7'.:: 

 73 40. 7 



Temp. Fahr. 



Dip when loaded. 



e 



:■: 



09.5 



14° 20'. 9 

 17 11.1 



Pip reduced. 

 i 



73° 4S',0 

 73 50. 1 



Mean 



73 49.2 



Relative total 



I 1 1 m l y 



1.1250 



1.1430 



1.1343 



Clear, cumulus, wind S. of W., brisk. 



