Why is the pound a measure of mass, not force (or currency?
Well, in the United States, the pound has been officially defined to be a unit of mass since at least 1893 (by the Office of Standard Weights and Measures, and later by its successor, the National Bureau of Standards (NBS), which was formed in 1901. The National Bureau of Standards was renamed the National Institute of Standards and Technology (NIST) in 1988.) It has had its current value since 1959, defined as exactly 0.45359237 kilograms (also a unit of mass,) both by official notice in the Federal Register, giving it the effect of official U.S. policy, and as an official refinement by the National Bureau of Standards. The latter document is very detailed and authoritative, and shows the very slightly different values it had in 1893 (then defined as 1/2.20462 kg, a mass), the value from 1894-1959 (then defined as 1/2.2062234 kg, also a mass, which only differs from the current exact value of .45359237 kg by about 1 part in 10 million.) All are quite unambiguous on this point. No stan
Well, in the United States, the pound has been officially defined to be a unit of mass since at least 1893 (by the Office of Standard Weights and Measures, and later by its successor, the National Bureau of Standards (NBS), which was formed in 1901. The National Bureau of Standards was renamed the National Institute of Standards and Technology (NIST) in 1988.) It has had its current value since 1959, defined as exactly 0.45359237 kilograms (also a unit of mass,) both by official notice in the Federal Register, giving it the effect of official U.S. policy, and as an official refinement by the National Bureau of Standards. The latter document is very detailed and authoritative, and shows the very slightly different values it had in 1893 (then defined as 1/2.20462 kg, a mass), the value from 1894-1959 (then defined as 1/2.2062234 kg, also a mass, which only differs from the current exact value of 0.45359237 kg by about 1 part in 10 million.) All are quite unambiguous on this point. No sta
