Data are presented to show that nitrate, quebracho tannin, and zero-caustic treatment have been applied successfully in stationary plants to prevent cracking in embrittlement-detector specimens. On one large railroad prevention of cracking in detector specimens has paralleled a spectacular decrease in boiler-seam cracking in locomotive engines. The principal conclusion from a survey of cracking in stationary boilers in the last 10 years is that embrittlement is not a frequent occurrence.

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