Proportional Points Along Ruled Lines (Series 171)
Lettered divisions g h K p and L m n q, with two hatched sub-segments
Series 171 arranges lettered points along horizontal lines: g 16, h 8 and K 8 to p on the upper line, and L 12, m 6 and n 6 to q on the lower, while the middle rows give a 8 – c 4 – b (12) and d 6 – f 3 – e (9). Hatching marks the sub-segments at h and m. The drawing renders the ratios as ruled lines ticked off into proportional parts.
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Series 171 of proportional divisions
The values run g 16, h 8, K 8 to p on the top line and L 12, m 6, n 6 to q on the bottom, with a 8 – c 4 – b summing to 12 and d 6 – f 3 – e to 9. Each row sets a magnitude against its proportional parts.
Hatched sub-segments on ruled lines
The upper and lower lines carry short hatched stretches — at the points labelled h and m — distinguishing one sub-segment from the rest of the ruled length. The tick-marks and hatching mark off the proportional cuts along each line.