This handy little instrument helps to figure quickly and accurately theheights of poles, trees, buildings or conductor clearance. A lineman canbe taught in a few minutes to use it. The diagram at left shows how itworks. Sight point A through the Teleheight and move backward or forwarduntil the bubble centers on the hair line, which will be point C.Measure distance from C to D and add distance BC to find correct height.Leather case (21/4" x 41/4") had belt loop.
