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INSTRUKENT :rOR KEASURING l!'IBERS. J. BoLm communicates to the IndUBtrie BlIitter particulars of an instrument invented by him for measuring the diame. ters of fibers of wool, silk, and substances of a similar na. ture. The method of cutting across the fiber cannot be reo lied on, as it is almost impossible to make the cut perfectly vertical, and the slightest deviation towards obliquity will give an erroneous result. A better mode is to stretch the fiber to get rid of the kinks, and to turndoi:10.1038/scientificamerican03081873-150 fatcat:gtubaejqdvcgrjqon74ps77y4m