Well, measurement is physics; mathematics is calculation (in a rather general sense). Incidentally, I think the word "calculus" happens to be more reflective of

Well, measurement is physics; mathematics is calculation (in a rather general sense). Incidentally, I think the word "calculus" happens to be more reflective of the nature of the subject than the word "mathematics" which seems to hide a simple notion behind an aura of mystery. "Calculus of Infinitesimals," methods of doing calculations using the notion of the infinitely small, is easier to guess what it is all about than when you first hear the mysterious "Mathematical Analysis."