48 



MAGNETICAL OBSERVATIONS. 



STATION No. II. POTRERO. 



A. North polo 

 A South pole 



Mean 



. 42 58.1 

 Resulting dip, August 17, 42 51 .2. 



STATION No. III. COCOLAPAM NEAR ORIZABA. 



A. North pole 

 A. South pole 



Mean 



Needle No. 1. 



. 43 22 . 5 

 42 9.1 



. 42 45.8 

 Resulting dip, August 26, 42 51 .5. 



STATION No. IV. SAN ANDRES CHALCIIECOMULA. 



A. North pole .... 

 A. South pole .... 



Resulting dip, September 18 

 STATION No. V. MIRADOR. 



A. North pole 



A. South pole .... 



Needle No. 1. 

 . 44 7 .7 



41 8.7 



42 38.2 



Needle No. I. 



43 43 .7 



43 55.0 



Mean 



. 43 49.4 

 Resulting dip, October 10 and 11, 43 49 .8. 



STATION No. VI. CITY OP MEXICO. 



A. North pole 

 A. South pole 



Needle No. 1. 



41 35M 

 41 1G.O 



Mean 



. 41 25.6 

 Resulting dip, December 17, 41 26 .3. 



STATION No. VIII. RANCIIO TLAJIACAS. 



A. North pole 

 A. South pole 



Needle No. 1. 



42 30 .3 

 42 26.4 



Mean 



. 42 28.4 

 Resulting dip, January 25, 42 34/3. 



42 44.3 



Needle No. 2. 



44 18 .3 



41 36.1 



42 57.2 



Needle No. 2. 



45 3 .0 



42 37.3 



43 50.2 



Needle No. 2. 



41 24 .7 

 41 29.3 



41 27.0 



Needle No. 2. 

 42 37 .8 



42 42.6 



42 40.2 



RECAPITULATION OF RESULTS OF THE MAGNETICAL OBSERVATIONS. 



