A fellow wrote to me just now to say that, as a high school student, he had become aware of the force of siphoned water, and came to understand that by “using two ponds, (he) could turn a water turbine …
A fellow wrote to me just now to say that, as a high school student, he had become aware of the force of siphoned water, and came to understand that by “using two ponds, (he) could turn a water turbine …
