From Wiki in the Maxwell unit: “This practical unit was previously called a line,[4] reflecting Faraday's conception of the magnetic field as curved lines of magnetic force,[5] which he designated as line of magnetic induction.[4] Kiloline (103 line) and megaline (106 line) were sometimes used because 1 line was very small relative to the phenomena that it was used to measure.”

So how is a “line” measured? Does anyone have specifics on this measurement?