| Show instrument warns of niagara ice forming niagara falls N Y arl an intricate machine combining wind velocity and water level gauges with a wind diree tion under finder warns the niagara falls power company when ice fee may bo be expected to form tn in the upper niagara river the contrivance invented by peter seller of niagara falls Is sheltered on grass island near the companas comp anys power houses bouses above the falls impressions made by the three devices are synchronized chroni zed on a sheet of paper which passes through the machine the wind velocity gauge Is 19 so con strutted ted that it operates a recording device which prints a red dot on the paper when the wind cups over nead have traversed a mile A pen operated by the water level gauge records the height of tile the water above mean tide at albany and the wind direction tinder finder a weather vane propels a stamping device with a rubber arrow which always points in ID the same direction as the vane passage of 0 time Is indicated on the paper so that the machine compiles an hourly record of the three instruments st sellers invention supplants three separate recording devices and eliminates a tedious job of comparison |
