1960 Volume 68 Issue 775 Pages 174-179
This report is extension of previous, i.e. experiments are extended to 2SiO2-Na2O, 4SiO2-Na2O, SiO2-Na2O-CaO, 2SiO2-Na2O-CaO, 4SiO2-Na2O-CaO, SiO2-PbO system.
The method of experiment is same as previous. By application of student test and x2-distribution to frequency distribution of diameters of silica, some results are obtained, i.e. extension of reaction, difference of frequency distribution between some systems and population of frequency distribution are became clear.