The Aliquot Parts of Six and the Circle of Bisangles
A great circle packed with seven interlocking circles, each divided into 42 lens-shapes
A great washed circle encloses a rosette of seven interlocking circles whose overlaps form 42 lens-shaped 'bisangles' apiece, a construction Leonardo counts up to 588 portions in all. The surrounding notes treat the number six as an aliquot part, listing its endless multiples with their ordinals and stating the proportion of like parts to like wholes. A marginal column runs the six-times table, and a small figure divides 378 portions by 6 to get 63.
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Seven circles filling the great circle, each with 42 bisangles
In this greatest circle nothing remains dark except the bisangles (lens-shapes), of which each circle contains 42. Each of these seven circles holds 42 bisangles, or 84 portions of a circle, each portion made of a straight line (the semidiameter) and of the sixth part of the circumference. The seven circles multiplied by 84 portions make 588 portions.
Six as an aliquot part, and its infinite multiples
The note concerns the aliquot part of six taken with all the following numbers, that is, those numbers of which 6 is an aliquot part, which are infinite. Rows of multiples of six are tabulated against their ordinal counts. Such proportion holds from like part to like part as from their like wholes to their like wholes.
Six-times table in the margin
A short marginal column runs the multiplication table of six: one times six is six, two times six is twelve, three times six is eighteen, four times six is twenty-four. A companion figure notes that 378 portions divided by 6 give 63.