MAGNETICAL OBSERVATIONS. 



47 



Station No. III. Cocolapam near Orizaba. 



Station No. VI. City op Mexico. 



Time of 1 vibration. Temp. 



December 10. 2^6321 



10. 

 10. 

 10. 



.6319 

 .6346 

 .6337 



r = 2.6331 



68°.2 

 68.6 

 69.5 

 68.8 



68.8 



Angles of deflection. 

 Distance. u. Temp. 



December 10. 1 foot 7° 2.5' 30" 68° 6 



" 10. 1.3 feet 3 22 38 07.9 



Horizontal intensity, December 10. 

 A' = 7.576. 



Station No. VIII. Rancho Tlamacas 



Time of I vibration 



January 25. 2 ^ 6344 



25. .6347 



" 25. .6340 



r = 2.6344 



MAGNETIC INCLINATION. 



Station No. I. Vera Cruz. 



A. North pole 

 A. South pole 



Mean 



Needle No. I. 



45° O'l 

 43 14.0 



Needle No. 2. 

 45° 44'.8 



42 15.6 



. 44 7.0 44 



Resulting dip, August 8, 43° 57'.7. 



0.2 



Needle No. 2. 



45" 1'.5 



42 30.5 



43 46.0 



