“There are many fingers pointing to the value of a training in science, as the one thing needful to make the man, who shall rise above his fellows.”—Frank Allen.
“The motto marked upon our foreheads, written upon our door-posts, channeled in the earth, and wafted upon the waves is and must be ‘Labor is honorable and Idleness is dishonorable.’”—Carlyle.
“A heavy wager has been laid
That there are tricks in every trade.”
USEFUL NOTES
Relating to Pumps and their Management
It happens at times that a pump, with the full pressure against which it is expected to work, resting upon the discharge valves, refuses to lift water for the reason that air within the pump chamber is not dislodged, but only compressed by the motion of the plunger. It is well, therefore, to arrange for running without pressure until the air is expelled and water follows. This is done by placing a check valve in the delivery pipe, and providing a waste cock in the discharge chamber to be closed after the pump has caught water. A stop valve is also required for shutting off the back pressure when the pump can be opened for examination of the valves.
* * *
If any difficulty is experienced in making a pump work properly when first started, it will generally be found in leaks through imperfect connections, or from the temporary stiffness to be expected in a new machine, or perhaps leaky valves.