History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c39.s5.4

c39.s5.4

But, besides these transformation of substances by 'isomeric' or 'heterogenic' (polymeric) process, ceaseless changes go on in the characters, the modality, and the states of substances—changes which are due to the unequal distribution of force (or of stress and strain,—pressure) among the *gunas*, which are in themselves constant.