this book in the Adyar Library Series. My thanks are also due to Sri Rao Bahadur K. V. Rangaswami Aiyangar for having read through the typescript of the lectures and Dewan Bahadur C. S. Srinivasa Chari for having helped me in the preparation of the 'Notes.' I also record my thanks to Mr. A. N. Krishna Aiyangar of the Adyar Library for pushing the work through the press by correcting the proofs and furnishing the book with an Index. The neat and expeditious printing of the work by the Vasanta Press has placed me under great obligation to the Manager, Mr. C. Subbarayudu.
Madras V. R. RAMACHANDRA DIKSHITAR
1st May 1947
