GURLEY Water Current Meter-Pygmy 100 YR OLD

Description

I BOUGHT THIS A FEW YEARS AGO TO KEEP TRACK OF WATER FLOWING IN A DECREED DITCH.  I NO LONGER NEED IT . YOU JUST LISTEN TO THE CLICKS THREW AN EAR PIECE, 10 REVOLUTIONS FOR ONE CLICK. COUNT THE REVOLUTIONS PER MINUTE TELLS YOU THE VELOCITY OF THE WATER. BY KNOWING THE AREA OF THE WATER CHANNEL YOU CALCULATE THE VOLUME OF WATER. PER SECOND. THIS IS A GREAT WELL MADE PRECISION TOOL FROM A FAMOUS MANUFACTURER VERY OLD  AND COLLECTABLE  WITH  ORIGINAL WOOD BOX, CHARTS , TABLES AND INSTRUCTIONS. FROM THE EARLY 1900S  USED BY PACIFIC GAS AND ELECTRIC ,