The Child's Book of Nature for the Use of Families and Schools Intended to Aid Mothers and Teachers in Training Children in the Observation of Nature. Revised Edition. Part 3: Air, Water, Heat, Light, etc. (1886)
Hooker, Worthington · Harper & Brothers · leaf 45
39 PUMPS. Explanation of the pnmp continued. … you could not pump up the water from it. You must have air there to push up the water, or it will not come up when you make room for it by working the pump. You see, then, that sucking and pumping are very much alike. In the pump the piston makes the room for the air and the water to be pushed up…
