Appletons' cyclopædia of technical drawing : embracing the principles of construction as applied to practical design ... (1896)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton · leaf 397
FIG. 879. FIG. 880. The safest and simplest way is to put a blank flange on below the valve andwith a force pump inject water to certain pressure, as shown by a steam gauge;balance this pressure by a weight P on the lever and mark its distance fromthe fulcrum, which will give the weight per square…
Mechanical drawing
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-83-29.webp)
