Miller,

I found it interesting that they were using oscilliscope data for their charts. Which means some one was sitting there ready to press a shutter, then had to run out and have the film developed. So the "smoothing" was most likely done to give the data a little more regularity.

Apparently they made some changes for the 1950's article, not surprising. Later, he cites a formula, which he calls Torricelli's Law used to calculate hydrostatic pressures to burst a barrel.

Pete

http://www.damascus-barrels.com/Movie.html