Pictured Puzzles and Word Play / A Companion to the Twentieth Century Standard Puzzle Book - A. Cyril Pearson

This is a simple way by which the figure given can be divided by four straight cuts into four equal and similar parts—

This is the way to draw twenty-two straight lines within the circle at right-angles to each other, so that they divide it into four similar parts—

and each part has three dots within its borders.