Yogi Ramacharaka 
Pranayama 

Pranayama is a Sanskrit word meaning breath or life force. The Indian tradition of Hatha Yoga makes use of various pranayama techniques. Many of these practices are known for their overall health benefits especially for those practicing various forms of Yoga. Pranayama is often described as expansion of individual energy into cosmic energy. This book offers a complete manual of these breathing techniques with many practical exercises and understanding of philosophical, psychic, and spiritual aspects of pranayama practice.