878. Gunner's quadrant for a Howitzer.
















879. Guesses for this one include: disc used to check turntable speed, atomizer for a rotary paint applicator, air cushion bearing, drawing template, air flow measurer, and tesla turbine disc. Haven't been able to verify any of them yet.












880. Cork cutters or cork borers, used in a laboratory to make a hole in a cork or rubber stopper for the insertion of glass tubing.
















881. Probably a dental press, used for compressing a mould.
















882. Signal light for use on the railroad.












883. Trough compass, used with surveyor's plane table.


























































Last week's set is seen below, click here to view the entire post:








More discussion and comments on these photos can be found at the newsgroup rec.puzzles.