Word: porousness
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...will float because of the water's surface tension. Surface tension is what makes water stick to the sides of a glass, and if a column of glass is fine enough, water will actually climb up its sides. Suppose, reasoned Walker, this "wetting" principle were applied to a porous membrane: would water filling the pores have enough surface (or "interfacial") tension to block other liquids while letting water through...
...000th of an inch. It worked. By treating porcelain so that it could be wetted only by a specified liquid (e.g., coated with a special stearate, porcelain is wetted by kerosene but not by water), he found that up to a certain pressure the membrane was porous to that liquid but not to others...
...industrial significance. He thinks, for example, that it may explain a phenomenon which has long puzzled physiologists: why it is that oxygen can pass from the lung into the blood, but blood cannot enter the lung. Walker's theory: blood vessels in the walls of the lung are porous membranes coated with fatty substances that are not wetted by blood, therefore they block blood but let gases pass freely...
Once limited to small shapes (like porous oil-filled bearings for automobile springs), plastic metals are now molded into thousands of parts, from tiny bearings (1/64th oz.) to big pieces (65 lb.). that replace castings on medium tanks. Powdered metals, molded to shape with heat and pressure, need little machining or finishing, save time as well as bronze, aluminum and other scarce metals...
...first half, amid lost balls galore, amid more traveling than has been seen anywhere since the Okies settled in California, the Elis moved to a 24 to 23 lead. Fleet Eli guard Gil Gibbon, one of the more flagrant offenders of the ban on walking, slipped through an amazingly porous Crimson man-to-man defense for twelve points in the first ten minutes...