Each plate has three scales labeled "S", "E", and "F" which may indicate Swedish, English and Flemish (Dutch) units of measure.
Quote from the text:
The horizontal scale is in French tons, English tons, and Swedish lasts.
The vertical scale, at right angles to the horizontal one and marked S, E, and F, is in Swedish, English and French feet. The curves marked No 1, No 2, No 3 etc., all of which meet at e, determine the burden of the vessels No. 1, 2, 3 etc. on Plates I, II, III, IV, V, VI and VII.
Excerpt from: "Architectura Navalis Mercatoria: The Classic of Eighteenth-Century Naval Architecture" by Fredrik Henrik af Chapman. Scribd.
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Read this book on Scribd: https://www.scribd.com/book/271545855
The horizontal scale is in French tons, English tons, and Swedish lasts.
The vertical scale, at right angles to the horizontal one and marked S, E, and F, is in Swedish, English and French feet. The curves marked No 1, No 2, No 3 etc., all of which meet at e, determine the burden of the vessels No. 1, 2, 3 etc. on Plates I, II, III, IV, V, VI and VII.
Excerpt from: "Architectura Navalis Mercatoria: The Classic of Eighteenth-Century Naval Architecture" by Fredrik Henrik af Chapman. Scribd.
This material may be protected by copyright.
Read this book on Scribd: https://www.scribd.com/book/271545855
Thanks for that, another year older and dafter LOL