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In J.D. Jackson's Classical Electrodynamics textbook, the analysis of Dirac'scharge quantization condition in the presence of a magnetic monopole has amathematical omission and an all too brief physical argument that might misleadsome students. This paper presents a detailed derivation of Jackson's mainresult, explains the significance of the missing term, and highlights the closeconnection between Jackson's findings and Dirac's original argument.

Comment on Jackson's analysis of electric charge quantization due to interaction with Dirac's magnetic monopole