188 ELECTRIC UNITS OF CHARGE BY G. C. LAURENCE, B. SC. 



mechanical method were made. The results of the three mea- 

 surements made with the condenser mechanically adjusted 

 were only used in determining the size of the correction discussed 

 in the preceeding paragraph. The mean of the fifteen results 

 (with the cylinders electrically adjusted) had a probable error of 

 .012%. Taking account of the errors in the resistances, the 

 frequency, and the correction, the probable error in the electro- 

 magnetic capacity became .07%. The probable error in the 

 ratio of the capacities is . 10% and hence the probable error in 

 the ratio of the units is .05%. The value obtained was 

 2.9963XlO"'cw./j^f. 



The author is deeply grateful to Dr. H. L. Bronson for the interest he 

 has taken, not only in this problem, but in the author's work throughoutthe 

 time he has been at Dalhousie. 



