The diameter of one yarn being known, the diameter of any other may be obtained by the following rule:—
Rule.—As the square root of one count is to the square root of another count, so is the diameter of one to the diameter of the other.
Example.—If the diameter of a 16’s yarn is the 1/110th part of an inch, find the diameter of a 36’s.
√16
:
√36
110
4
: