The technical testing of yarns and textile fabrics : with reference to official specifications
A technical manual from 1898 by J. Herzfeld, published in London by Scott, Greenwood & Co., written for textile testers and mill engineers to explain how yarns and fabrics are tested against official specifications. The pictures are black-and-white line engravings of measuring instruments such as a dial strength gauge, a pocket spring scale, a breaking strain tester, a large dial balance and a micrometric balance, with numbered scales and captions beneath. A designer could take from them the precise, mechanical drawing style of Victorian scientific instruments, with clean hatching and crisp labelled dials.
