One suggestion that will help everybody doing
studies from Bridgman or anyone else for that matter.
Always work at least as large as the original.
In Bridgman's case most of these drawings were
class demo's and were done much larger that the repro's in the book!
So when your drawings don't seem to have the
same flow or rhythm part of the problem is scale.
I have drawn all of the Bridgman drawing's more
then once and read the copy several times as well.
The problem with the book(s) is that the
copy sometimes does not relate well to the drawings on that page.
I think on the second reading one must go
through very slowly and diagram what he is
saying in the text to get the maximum benefit.