Installment of E. A. Posselt's 'Fabric Analysis' series from Posselt's Textile Journal, May 1917, on testing the strength and stretch of single threads. It describes hand- and oil-controlled strength and elasticity testers (Knapp, Henry Baer & Co.), a silk skein tester, a continuous-acting strength tester, and the Moscrop multiple-thread tester made by the Draper Corporation. Practical advice is given on how many tests to run and how to interpret results. The second page also carries a short news item on British requisition of Russian flax.