on the Distribution of the Magnetic Intensity. 



43 



OBSERVATIONS AT INVERNESS, continued. 

 FLAT NEEDLE. First Arc 20. FLAT NEEDLE. First Arc 20. 



REDUCTION OF OBSERVATIONS MADE AT INVERNESS. 

 CYLINDER, No. I. First Arc 30. 



Log reduction of the Flat Needle to Cylinder No. I. = 0-1067781. 



r 2 



