To many, a pound is a pound and a gallon is a gallon. But setting those exact standards is one of the basic functions of government.
It's even in Article I of the U.S. Constitution, alongside coining money.
Now, the state of Tennessee has a new lab — entirely dedicated to checking whether things are being weighed and measured correctly. Last week, the Department of Agriculture opened a new metrology laboratory in Nashville, and it replaces a building that was so out-of-date, federal authorities essentially said Tennesseans couldn't use it.