270 ON THE DETERMINATION OF THE TOTAL INTENSITY. 



for the determination of the magnetic intensity, and with the 

 separate adjustments required in erecting it. 



3. The constants to be determined the magnitude of the 

 added weight, and the radius of the pulley by which it acts, can 

 be ascertained with more ease and certainty than those which 

 are required in the method of vibrations, and are less liable to 

 subsequent change. 



4. The observations themselves are less varied in character 

 than the usual ones, and may be completed in a shorter time. 



