Word: leadless
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Next came tetraethyl lead, introduced in 1922, which acts like a high content of isooctane. Added to the best leadless gasoline, it raises the octane rating to around...
...Metallographer Oscar Edward Harder of Battelle Memorial Institute (Columbus, Ohio), working with Inland Steel Co.'s research staff, has developed a lead-steel alloy (one part of lead to 500 parts of steel) which is just as strong as leadless steel, but can be machined 30% to 50% faster for mass-production parts. The soft, tiny particles of lead in the alloy serve to lubricate the point where the tool cuts; the tool stays sharp longer, the machine runs faster...
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