Synopsis This book "Text Book of Heat" primarily intended for students preparing for degree and honours students of various Indian universities. Since the present day student is some what pressed of time the treatment has been kept short and direct only such historical and other additional information has been given as may possible interest the more serious type of student. An attempt has been made to make the language as simple as possible. We hope this book will be found useful by the students and teacher in the various universities and institutions of India.