The object of this study is a Hindu divinatory practice known as nadi reading. I use the word divinatory here in a broad sense, akin to the definition given by Luck:
Foretelling the future, interpreting the past, and, in general, discovering hidden truth (by way of clairvoyance, precognition, telepathy, and other such phenomena) was called divinatio by the Romans. The noun divinatio is derived from the verb divinare ‘to predict’, which is no doubt related to divinus ‘divine’ in the sense of “pertaining to a god or to the gods”.
It may not be out of place to remark initially that divination, whether sanctioned or condemned by religious authority, has been practised within every major religious tradition, and continues to thrive even today – within the boundaries of traditional religions as well as in the context of New Age or ‘esoteric’ spirituality, where it often plays a major part. This staying power of divination is no doubt largely due to its intimate relation to fundamental religious questions concerning fate and free will, divine intervention and retribution, etc., as well as to ritual observances of many kinds. The study of divinatory theory and practice therefore forms an important aspect of the study of religions past and present.