Emergence of chemistery:
Chemistry The level of chemical knowledge and practices in the new ordered society is reflected in the pottery, iron tools and glass objects found at various Iron Age sites. The iron tools that you see in Fig. 3.5, indicate a fairly advanced knowledge of iron smelting. By the fifth or the' fourth century B.C., the Indian metalworkers had attained a high degree of perfection in the techniques of producing iron and steel. Glass objects unearthed in over 30 sites indicate that production of glass came to be known only towards the end of this period. Ceramic bowls, dishes, lids and carinated jars ('handis') dated from about the sixth century B.C. to the second century B.C.. were also found in these sites. Fermentation methods, dyeing techniques, the preparation and use of a number of cheniicals and colour pigments were well known.