on the Distribution of the Magnetic Intensity. 



OBSERVATIONS AT HELMSDALE. 



The Observations were made in the Field in which the Old Castle stands; about 150 yards 



west of the Ruins. 



CYLINDER, No. I. First Arc 40. 



CYLINDER, No. I. First Arc 40. 



REDUCTION OF THE HELMSDALE OBSERVATIONS, WITH CYLINDER, No. I. 



E 2 



