Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 830
Oct filled with wal i 5 ft. B in. d • r up and down in the v. ipper and I 11 820 WATCHMAKING. weight to cause the bell to descend and expel the air in the lower compartment. Now, for the pui postof setting the beam in motion, it is necessary to have some movable power to overcome the friction olthe…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
