Show straight silica glaes glass A deposit of silica mineral of tol 1 canic origin has been found in czechoslovakia abla which can be used directly in the manufacture of glass glas i without the need of adding any of the other common ingredients umed in making up the glass batch this silica mineral ii Is eald said to resemble lava and it Is 15 under stood that the deposits are very large and that oat steps are being taken to ike lize them commercially chemical trade journal people who mho weigh their worda words sel dora dom speak lightly |