Original camera; 400 feet plastic canister; BR TF19 reference to old railway technical films catalogue / "Kegworth" station sign filmed on first frames / B&W, Silent / Edited original reversal / Approx. 200 feet /Scratches and splices / Shots showing men shoveling ballast, digging, to bury and install earth pressure cells by the tracks, data apparently collected in signal box by other men, and results being read in laboratory by scientist (man wearing white coat)