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up and down to facilitate flood-loading railroad cars of <br /> different heights and by-passing the engines . A bypass <br /> chute is also installed on this gate to permit the continuous <br /> loading of coal into cars when the main chute is between <br /> railroad cars . <br /> The unit train operator controls the loading of the <br /> unit train from the control station located at the surge <br /> hopper . Stop-start switches for all motors on the belts and <br /> the plow are located at the control panel . Amp-meters which <br /> show the load on the rotary plow and tunnel belt are also <br /> installed on the panel board to permit the operator to <br /> monitor the rate of loading . The panel is equipped with <br /> high and low bin lights on the surge hopper . <br /> An automatic sampler adjacent to the surge hopper <br /> samples all coal fed into railroad cars by taking an incre- <br /> ment of coal and reducing it to a working sample size for <br /> each five railroad cars loaded . A centrifugal fan contin- <br /> ually circulates air throughout the loadout tunnel during <br /> loading operations . <br /> After the train is loaded , it is weighed on a weigh-in- <br /> motion scale ac a speed of 4 miles an hour . The gross <br /> weight of each car and its identification is printed on the <br /> teletype machine in the office for billing purposes . <br /> A bonus feature of the rectangular storage bin is that <br /> blending of coal occurs as the material moves through t:Ie <br /> bin. Since the coal is stored in more or less vertical <br /> 4 <br />