In the following pages I have made an attempt to present the main metaphysical doctrines of two of the Hindu Schools of Philosophy, the Vaisheshika and the Nyaya, constituting what may be called Hindu Realism. The attempt has been made after I have tried, during my residence at Cambridge, to understand and assimilate the European attitude in matters philosophical and the European mode of philosophic thinking. I have not made any explicit comparison between the Realism, or any other phase, of European thinking and the Realism of the Hindus; but I have always kept the European ideas and attitude before my mind, so as to make this presentation of Hindu Realism intelligible to the Western reader.