Show GLASS SAND USED IN THE U S truth is stranger than fiction and one of the anomalous bits of truth given out by the united states geological survey department of the interior Is the tact fact that a thing so clear as glass Is composed mainly of sand to be explicit sand forms from 60 to 75 per cent of all glass manufactured according to recent figures a little less than tona toils of glass sand was used in ila the united states iri in 1919 fortunately the supply of glass sand of all grades Is abundant grinding polishing and blast sands sanda are used to make smooth the rough places on metal glass stone and other hard substances blast sand Is clean tough sized sand compos composed ed of elthea either round or angular grains which Is driven by compressed air through a hose tor for buch purposes as cleaning metal castings and dres dressing sing stone in gun shops locomotive and car shops and most other places where heavy metal castings are aremia made de the band blast Is used to clean off parts of the mold that adhere f to the castings the size of carrr sand d used differs according to the I 1 I 1 character of the duty it is to perform fire or furnace sand is highly refractory frac tory silica sa sand 11 id tor for lining turned acas and ladles ui aed to contain molten t rit metal stal and so ihas has a place in all for indries abou tons of 0 illif acs bilu is us d annually arnu ally in the united states |