Absorption of nitrogen from the air and carbon from contaminating substance has been found on the surface of quartz glass, soda-lime glass and lead crystal glass samples.
在石英玻璃、钠钙玻璃和铅晶质玻璃的表面，发现吸附有来自空气中的氮以及有机沾污物的碳。
2
Some kassite is found in the red mud, and its crystal parameters are determined. The chemical cause for the reduction of caustic soda losses is also analysized.