Drawing a Human Figure in Correct Measurements and Proportions with Archaic Calculations
Here is a blurb from an old book that sheds light on how artists use to figure out the correct measurements and proportions of the human body.
body proportions
How to Draw the Human Figure : Drawing Body, Head, Facial Features
A study of the human body and figure with the following drawing lessons of the human body, head, face, facial features and body proportions of children, women, and adults.