Word: provedâ
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Speck of Gas. Engineers long ago learned that metals contain absorbed gases. Recently they learned that in lubrication the oil soaks into metal, oozes out when the machine operates (TIME, June 13). How deep into the metal does a gas go, skin-deep or throughout? Dr. Abraham Lincoln Marshall proved???with special heating, evacuating and analyzing devices ?that gas thoroughly permeates metal. From a piece of molybdenum he extracted a speck of gas one-eighth the volume of a common pin, one 100-millionth of an ounce. Dr. Marshall found it a mixture of 43% carbon monoxide, 57% nitrogen...
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