An entirely new method of filtering gases and liquids-a simple, cheap, quick way to separate air from water, water from oil, etc.was announced last week by Selas Co., a Philadelphia engineering firm that has fathered many another useful recent invention.* Its industrial possibilities are so far-reaching that the discovery may prove as significant as invention of the sieve, the basis of all mechanical filters.
Its discoverer is a young Selas physical chemist named John M. Walker. He has astonished engineers with some of his demonstrations: e.g., he pours a mixture of kerosene and water into a tube; the liquid comes out rapidly...
To continue reading:
or
Log-In
