Show Sulphur Stone Sandstone Is of little value as a building material as It will not stand pressure In excess of some po pounds per square Inch Recent experiments experiments experiments ex ex- by the United States board of standards Indicate a cheap method of making sandstone as strong as oa granite The stone Is cut then soaked In melted sulphur for several hours The sulphur permeates the structure and when cold blocks will stand a pressure of pounds compres compres- sion Tests for weathering qualities are still sUIl in Jn progress but Initial results are reported to be extremely favorable Exchange |