The Tarkabhasa or “Exposition of Reasoning” of Keshava Mishra is an elementary treatise on the Nyaya system. It explains, in brief, the main tenets peculiar to that system, along with certain other details which that system subsequently borrowed from the sister system of the Vaisheshikas. Pt. Ganganatha Jha chose this work for translation because of its freedom from the intricate polemics that make many Nyaya works repellent to the ordinary student. This translation will serve as an introduction to the study of more abstruse works: the Bhashya of Vatsyayana and the Varttika of Udyotakara, which constitute the chief and original authority for the Nyaya.