on the Distribution of the Magnetic Intensity. 



11 



OBSERVATIONS AT MAKERSTOUN, continued. 

 FLAT NEEDLE. F LAT NEEDLE. 



The Observations at Makerstoun corrected for temperature, and the time of 300 vibrations 

 reduced to that of Professor HANSTEEN'S Standard Cylinder by DOLLOND. 



CYLINDER, No. I. 



B 2 



