J. C. Maxwell’s, ‘Dynamical theory of the electromagnetic field’

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                                Electric Quantity 

(68) Let e represent the quantity of free positive electricity 
contained in unit of volume at any part of the field, then 
since this arises from the electrification of the different parts 
of the field not neutralizing each other we may write the 

Equation of Free Electricity 

e + df/dx + dg/dy + dh/dz = 0 (G) 

(69) If the medium conducts electricity then we shall have 
another condition which may be called as in hydrodynamics the 

Equation of Continuity 

de/dt + dp/dx + dq/dy + dr/dz = 0 (H) 


                            
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Manuscript details

Author
James Clerk Maxwell
Reference
PT/72/7
Series
PT
Date
1864
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Cite as

J. C. Maxwell’s, ‘Dynamical theory of the electromagnetic field’, 1864. From The Royal Society, PT/72/7

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