The Mexican mining journal . Courtesy Mesire View Co Indian Coffee \V nrkers On the Way to the Crockery Courtesy Mexico View Co Loading the Mexican Ship of the Desert. A load of Charcoal. .177 MEXICAN MINING JOURNAL: , May, 191&. to some particular class of work, as wood-cutting, forexample. These steels are stated to be intermediatebetween the high-speed and ordinary steels, and evi-dently are developed from the ordinary self-hard-ening steels by varying the alloy-content so as tosecure the highest degree of toughness and edge-holding quality, essential to tools not expected tostand
The Mexican mining journal . Courtesy Mesire View Co Indian Coffee \V nrkers On the Way to the Crockery Courtesy Mexico View Co Loading the Mexican Ship of the Desert. A load of Charcoal. .177 MEXICAN MINING JOURNAL: , May, 191&. to some particular class of work, as wood-cutting, forexample. These steels are stated to be intermediatebetween the high-speed and ordinary steels, and evi-dently are developed from the ordinary self-hard-ening steels by varying the alloy-content so as tosecure the highest degree of toughness and edge-holding quality, essential to tools not expected tostand up to the kind of work required of high-speedtools, rather than red-hardness, which is not essen-tial to this class of tool- They purport to fill a gapwhich has been recognized ever since high-speed toolsiiibt came into geneial use, furnishing a tool possiblyshghuy less lasting in service, but at a considerablylower cost. The precise field for these steels remains to be de-termined. Doubtless they will come largely into usefor wood-working and such metal-working tools asrequire keen edges, but work in s
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