bad knots, waste. two-threads, nibs.
Plate 4. Bad Knots.
(cropped to square; inverted; levels 20 1.00 255)
Warren P(haroah). Seem (1872-?). "International Classification of Raw Silk by Its Defects." Silk Essays : Consisting of Several Essays and Abstracts Submitted in the Silk Association of America Prize Essay Competition (1915) : 11-43
University of Michigan copy, digitized May 29, 2007
opens to same illustration, in the same author's Raw silk properties : classification of raw silk and silk throwing (1922) at archive.org.
twisted on ends
28 January 2016
tags: classification; cohesion machine; defects; knots; lines; silk; uncleanness; W. P. Seem