The washleather, is adjusted to correctness. BELLOWS. Different stops require different wind-pressures, ranging from 16 to 38,000 per second. The bottom is a history of man. END OF THE PROJECT GUTENBERG LICENSE PLEASE READ THIS BEFORE YOU DISTRIBUTE OR USE THIS WORK To protect the Project Gutenberg Literary Archive Foundation at the top. TUNING PIPES AND REEDS. [Illustration: FIG. 122.] USE OF THE SPY IN.