This book is a defence of a form of realism which stands closest to that upheld by the Nyãya-Vaid'sesika school in classical India. The author presents the Nyãya view and critically examines it against that of its traditional opponent, the Buddhist version of phenomenalism and idealism. His reconstruction of Nyãya arguments meets not only traditional Buddhist objections but also those of modern sense-data representationalists.

v. 1. The philosophy of the Veda and of the epic.--The Buddha and the Jina.--The Sāmkhya and the classical Yoga-system.--v. 2. The Nature-philosophical schools and the Vaiśeṣika system.--The system of the Jaina.--The materialism.