Section 12: The Electric Field Tensor
Added the four-dimensional permutation symbol term, , to both (12.8) and (12.9). Otherwise, (12.8) and (12.9) are unchanged.

Section 12: The Electric Field Tensor
Added " is the four-dimensional permutation symbol" after (12.8).
Appendix B: Previous Editions
Added the paper submitted to Physical Review Letters on March 1, 1999 (First Edition).

Section 18: Multiplication of Four-vectors
Added this section and renumbered sections 18 and 19 to sections 19 and 20, respectively.

Section 12: The Electric Field Tensor
Added text to this section, otherwise it remains unchanged.
Section 18: Multiplication of Four-vectors
Added equations (18.7), (18.8), and (18.16) describing the products , , and , and , , and along with associated text.

Section 12: The Electric Field Tensor
Changed the positive sign preceeding the term in (12.8) and (12.9) to a negative sign.

Section 6: The Transformation Equations
Changed the "+" and "-" signs preceeding some of the terms in (6.1) to the combination signs "" and "" (plus/plus and minus/minus), along with associated text.
Section 11: The Electric Field Four-vector
Added the generator of the components of the electric field four-vector, . Note that the signs associated with the terms on the right-hand side of (11.1), actually are the combination signs associated with the transformation matrix (6.1), but as mentioned in section six, only one of the signs will be used for simplification. However, before performing any mathematical operations using (6.1) or (11.1), we must reintroduce the proper combination signs.
Section 18: Multiplication of Four-vectors
Explained that the electric field four-vector equation (18.14) is a combination of two sets of multiplication rules reflecting the changes in (11.1).
Reversed sides of the terms in (18.14), (18.18), and (18.19).

Section 4: Proper Values
Changed, , to, .
Section 10: The Potential Field Four-vector
Changed the definition of the spacetime interval, , back to the Third Edition definition, that is, it is defined as in (3.2). Therefore, if , in (3.2), even though the spatial part of is zero, the potential remains finite.