The hand pump first influenced farming by helping control irrigation systems. Its value lay in making water movement easier to regulate. A second early use is mentioned, but the wording is unclear. The historical point that survives is the connection between hand pumps and agricultural water control, while the later application remains unidentified.
Notable Point · 1:33:27-1:33:38
Hand pumps and irrigation control
A short aside links the hand pump to irrigation control, while the next example is too unclear to identify with confidence.