. Electric railway journal . Testing Laboratory Nuttall Tests are your Brinell Machine for Test-ing Structural Hardness Guarantee A well-equipped chemical labora-tory is maintained to determine thechemical analysis of all steel beingheat treated for Nuttall Gears. After heat treatment the gears andpinions are tested with a BrinellMachine to determine the struc-tural hardness; while a Sclerescopeis used to find the surface hardness.

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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp