07 Dec




















Three systems are in vogue, and the confusion arising there- from is illustrated in this table : Pottery. Metallurgy. Pure Formula Mole- Oxygen Chemistry R". cular ratio : and ratio : Name. Name. Mineralogy. c3 o 11 3RO . !SiO 2 1 i silicate 1:1} sub-silicate paras ilicate 2RO . !SiO 2 1 |

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