404 



Dr. W. L. Robb on Oscillations 



5. Effect of varying the Capacity. 



The paraffin condenser was constructed so that a part of 

 its capacity could not be used. Consequently the effect ot 

 varying the capacity upon the variations in the charge was 

 only determined with the mica condenser. The results of 

 these observations are given in Table X. 



Table X. (See also diagram 6.) 

 Mica Condenser. 





Capacity = 1 



microfarad. 



Capacity = 



5 microfarad. 





Normal cha 



-ge = 1-976 



Normal cha 



•ge = 0-988 





microcoulombs. 



microcoulomb. 



Observation 



















number. 



Charge of 



Deviation 



Charge of 



Deviation 





Condenser. 



from the 



Condenser. 



from the 





Micro- 



normal 



Micro- 



normal 





coulombs. 



charge. 



coulombs. 



charge. 







1 



2010 



+0034 



0-993 



+0005 



2 



1925 



-0051 



0-983 



-0005 



3 



1-858 



-0-118 



0979 



-0-009 



4 



1-972 



-0-004 



0-969 



-0019 



5 



1-908 



-0 068 



0974 



-0-014 



6 



1 -945 



-0031 



979 



-0-009 



7 



2-015 



+0-039 



0-991 



+0-003 



8 



1-965 



-0 011 



0974 



-0014 



9 



1-917 



-0059 



0-975 



-0013 



10 



1-975 



-0001 



0-991 



+0003 



U 



1-947 



-0-029 



0-978 



-0010 



12 



1-963 



-0013 



0-9' »9 



-0019 



13 



1-955 



-0021 



0-989 



+0001 



14 



1979 



+0-003 



0-983 



-0005 



15 



1-925 



-0051 



0-974 



-0014 



16 



1957 



-0 019 



0-970 



-0-018 



17 



1-965 



-0011 



0-973 



-0015 



18 



1-957 



-0 019 



0-991 



+0-003 



19 



1-948 



-0028 



0983 



-0005 



20 



1900 



-0076 



0-983 



-0-005 





p 



Diagram 6. (See Table X.) 



0-2 





Mica Condenser. 

 Twenty consecutive observations. 































(VI 















o- 











+ ....+ C = l microfarad. 

 q C = 0\j microfarad. 



An inspection of Table X. and of the graphical representation 



