Keep in mind, this is one particular look that Harrington is reproducing. One with heavy contrast, very dark shadows, and a rather light editing touch. Not all of the 40s glamor photography went in this direction. Ernest Bachrach's work, for instance, was posed very similarly, but with much softer lighting, and generally less contrast. And let's not forget the classic film tricks of slapping pantyhose over the lens to soften things up a little!