HARP line tool

Yes, these books are content redundant. Redundancy & simplicity are at the core of reliability & how we learn languages.

In MUD , we took a broad look at the knee angle graph (minus its erroneous standard deviation envelopes) and acquired a new language of walking. Academics began with footprints in fossilized mud and kind of got stuck in it as well. Strobe methods eventually followed with Muybridge using a battery of sequentially triggered still photo cameras.

to Braune & Fischer (using worn strobe lights) whose flashes were collected on large photoplates in two planes (3D).