Basic standards and fundamental constants

The importance of precision electromagnetic measurements to the fundamental constants, and vice versa is examined. The idea that recent advances in the determination of a number of constants may have made future least-squares adjustments of the constants unnecessary is also discussed. Some of the fundamental constants considered are: the vacuum speed of light, the gas constant, Avogadro´s constant, the proton-to-electron mass ratio, and Rydberg´s constant for infinite mass