Authors:

The equations at which we arrive must be such that a person of any nation, by substituting the numerical values of the quantities as measured by his own national units, would obtain a true result.

James Clerk Maxwell (2002). “The Scientific Letters and Papers of James Clerk Maxwell:”, p.518, Cambridge University Press
The equations at which we arrive must be such that a person of any nation, by substituting the numerical values of the quantities as measured by his own national units, would obtain a true result.