Show sulphur stone sandstone Is of little value ns as a building Milt erial ns as it will all not stand pressure in excess of saine some pounds per square inch recent experiments peri perl ments by the united suites stat e I 1 board of standards indicate a cheap method of making sandstone as strong us as granite tile the stone Is cut then soaked in welled melted sulphur for several hours the sulphur permeates the structure and wh when en cold blocks will stand a pressure of pounds compression tests for weathering qualities are still in progress but initial results are arc reported to be extremely favorable exchange |