Table of Proportional Numbers
The proportion study reduced to a bare table of the values 16, 9, 4 and 4, 3, 2
The leaf strips the proportion study down to a numeric table, pairing the columns a 16, b 9, c 4 with d 4, e 3, f 2. Read as ratios, 16:9:4 is set against 4:3:2, isolating the arithmetic behind the segment diagrams on the neighbouring pages. Faint pencil lines show the figures from which the numbers were taken.
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Table of proportional numbers
The leaf reduces the segment studies to a bare numeric table: a 16, b 9, c 4 set against d 4, e 3, f 2. Read as ratios these two columns compare the magnitudes without any drawn figure, isolating the arithmetic of the proportion.