Paul, with a pocket-knife and a number of bits of wood on the table before him, was making a model of a force-pump.
If they are produced as by a force-pump, they are an insult.
Now the piston in the force-pump is about one inch in diameter.
This elasticity performs the function of the air-chamber of the force-pump.
As the wells were less than thirty feet deep, a force-pump would not be needed to lift the water to the earth-level.
I spray with London purple, using a force-pump, and think I have reduced the codling-moth.
I fell with such force as to eject from me, as from a force-pump, the water I had swallowed.
Divers could sit inside, and fresh air was supplied by a force-pump.
Your heart is a sort of force-pump, and every time it beats it forces the blood all over you.
The element of natural growth is pushed to one side and the hothouse and the force-pump are substituted.