Miller,
No problem, for you...
From the text on page 20;
Curve A - representative of the characteristic pressure curve developed by a double-base or nitroglycerine powder such as Ballistic.
Curve B - Dense Multi Base Powder, DuPont MX Smokeless.
Curve C - Bulk Nitrocellulose Powder, DuPont Bulk Smokeless.
Curve D - Black Powder
Curve E - Progressive Burning Nitrocellulose Powder, DuPont Oval Smokeless.
He states that the curves have been smoothed or cleaned up from the actual oscilloscope data. Also they have further been "adjusted" for publication.
My copy came from the library of Max Thompson, a Winchester-Western Ammunition product service manager in the early 1960's.
Pete
