Geometrie Practique By Charles de Bouelles.
You can pick up a copy on Ebay for the great price of $2850.00 or you can buy one at Abebooks,com for 9 thousand or 21 thousand. evidently a very rare book.
Published in 1555 and considered a landmark in the knowledge of geometry. What is relevant to this site is it has a section on human proportions.
De la Grandeur & stature de tous corps humains.
Height and the stature of all humans.
Geometrie Practique By Charles de Bouelles on Ebay
You can search for a copy at Abebooks.com. Use the search terms "
Geometrie Practique By Charles de Bouelles."
Wikipedia article: Charles de Bouelles
Livre singularis touchant l'art et pratique de Geometrie By Charles de Bouelles
Another webpage: dutarte.club.fr
You might also be interested in a more complete book about human proportions from the 1800s The Sculptor and Art Student's Guide to the Proportions of the Human Form.
Also available at Amazon.com: The Art Student's Guide to the Proportions of the Human Form