PLATE LVir 



Fig. I. — Diagrammatic drawing of the liber-testing machine of the Philadelphia 

 Textile School. "/, Jaws with screw clamps for holding the fiber; the lower jaw 

 may be raised or lowered; R, sliding rod working on a rack and pinion; this takes the 

 place of weights; G, wheel graduated on its face in decigrams, moving on the same 

 axis as the pinion for sliding the weight; T, thumbscrew for turning the small shaft 

 working the pinion at P; W, counterbalancing weight for regulating the zero point 

 of the machine; 5, scale for reading the sketch of the fiber." (From Matthews' The 

 Textile Fibres.) 



Fig. 2. — Fiber-testing machine removed from its case. 



Fig. 3. — Diagram showing the arrangement of the wool-testing apparatus at the 

 Montana Agricultural Experiment Station. 



