Ratios of Proportion: Double, Triple, Quadruple, Quintuple
Multiplex ratios named on a sheet of numeric proportion tables
A figure on this sheet is labelled with the ratio names quincupla, quadrupla, tripla and dupla - the classical terms for the multiplex proportions 5:1, 4:1, 3:1 and 2:1. The page as a whole is filled with dense untranscribed proportion theory, including a grid of numerals and further ratio terminology (multiplex and superparticular kinds) written in Leonardo's hand. Only the short label of the numbered figure is given in the transcription.
On this page
Names of the multiplex proportions
Beside the figure of numbers stand the ratio words quincupla, quadrupla, tripla and dupla - the quintuple, quadruple, triple and double proportions in which one quantity contains another an exact whole number of times.
Grid of proportion tables (untranscribed)
Across the centre of the sheet runs a grid of numerals with further ratio terminology not included in the transcription, arranging the multiplex and superparticular classes of proportion. The numbers are laid out in rows and columns as a working table of ratios.