The observations of operating people on the new ideas and new developments will aid in pointing the way toward future progress. ... This volume is designed to provide a basic source of present-day knowledge in the field of aircraft gas turbines. ... Handbuch der Mechanislerung der Kohlengewinnung Edited by Heins Kundcl. ... instruments are detailed in this work, together with the principles of operation and complete calibration instructions for each. ... Manuel de Base de Ia#39;lngenieur.