Because it was funded by the National Science Foundation, the original editions of the Berkeley Physics Series contained notices on their copyright pages stating that the books were to be available royalty-free in five years. The copyright page of the original 1965 edition of Electricity and Magnetism includes a notice stating that it is available for use by authors and publishers on a royalty-free basis after 1970. The authors got lump-sum payments but did not receive royalties. The copyright page of the 1965 edition says to obtain a royalty-free license from Education Development Center.