. The street railway review . PACKINGS TESTED. 11. Spiral, round, jA-in. Two wedge-shaped strands of wovenflax in center, and two strands of canvas, the whole surrounded bya woven cover saturated with graphite and oil. There seemed to bealso some paraflin present. 12. Spiral, round. J/S-in. .^ rubber core, around which arebraided three thicknesses of hemp or flax, soaked in oil. The wholecoated with paraffin. 13. Spiral, round. >i-in. A rubber core, surrounded with layersof woven cloth and rubber, impregnated with ground mica. 14. Square. pump packing. .Mternate packing. Alternatelay
. The street railway review . PACKINGS TESTED. 11. Spiral, round, jA-in. Two wedge-shaped strands of wovenflax in center, and two strands of canvas, the whole surrounded bya woven cover saturated with graphite and oil. There seemed to bealso some paraflin present. 12. Spiral, round. J/S-in. .^ rubber core, around which arebraided three thicknesses of hemp or flax, soaked in oil. The wholecoated with paraffin. 13. Spiral, round. >i-in. A rubber core, surrounded with layersof woven cloth and rubber, impregnated with ground mica. 14. Square. pump packing. .Mternate packing. Alternatelayers of canvas and rubber. No lubricant. 15. Square. J^-in. Similar to preceding, but having a rubberback about % in. thick. 16. Square, A-in. Alternate avers of rubber and canvas. Nolubricant. 17. Spiral, square, i-in. Woven flax, soaked in oil. .\s at firstconstructed, the gland was adapted for packing ^i in. thick. The flat 852 STREET RAILWAY REVIEW. [Vol. IX, No. 12 ring and sectional packings of this size, such as Nos. I,
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
