Show HYGIENIST TESTIFIES AT DUST HEARING Robert T. T Pring industrial hygienist hygienist hy- hy for the Utah Copper company corn corn- pany any occupied th the witness stand in federal court Friday at a trial involving involving in- in Magna residents the company and tailings dust Mr Pring testified to intensity duration and occurrence of dust- dust storms in the Magna vicinity which allegedly result from wind blowing across cross the tailings dumps on the southern shores of Great Salt lake The Magna residents termed in inthe inthe the he proceedings Thomas L. L Thomast Thomas et t al seek an injunction forcing the company to allay the dust situation Another nother phase of the suit asks damages allegedly incurred by residents residents resi- resi dents because of the dust Vegetable Vegetables barley clover alfalfa and nd other produce still occupied a prominent exhibit space in Judge Tilman ilman D. D Johnsons Johnson's courtroom as ashe the he trial progressed into its fourth day ay During Thursdays Thursday's session Dr pro Franklin S. S Harris president of Brigham Young university occupied the he witness chair and outlined experiments experiments ex- ex conducted on crops that were vere sprinkled with varying amounts mounts of tailings dust t |