This is from the 1951 Mitchell System and discusses the normal seat and the two deviations: full and flat seat and the kind of trouser back that should be cut for a certain deviation. It's a good one-page overview and in particular reminds you that, as is quite often the case, people with a flat seat do not necessarily have a small seat measure.
(http://i628.photobucket.com/albums/uu5/vanderloo/Fitting/NewMitchellSystem25.jpg~original)
This is of interest to me for two reasons:
- I personally need a flat seat adjustment for nice fitting trousers
- Antique drafting systems (e.g. DeVere's, ca. 1866) that I use for historical reenactment clothing often have a full seat and slanted seat line like Diagram IIC. This makes very comfortable trousers, especially for sitting; but not very stylish looking.
I'm trying to understand the theory better. What does the dotted line in the figure represent, the front side of the trousers?
Jim,
Its just the right angle from the vertical line of the pattern.