Keeping the same tension, it may be shown that nl is constant by finding n for various lengths.

Taking any number n to be represented by a point on a line at distance nL from a fixed point 0, where L is a unit of length, we start with a series of points representing the integers I, 2, 3,.

In mentioning any single tooth, such a sign as mi will mean the first upper molar,, nl the first lower molar, and so on.