They can boil old nasty "gray water", or they can make a desalinator and remove the salt which works kinda like a moonshine still by boiling the water and then cooling the steam down and out the other end comes fresh water, or they can catch rain water.
He tells John that he would like the "experiment" (of John living in London society) to continue. In other words, he is interested in continuing to experiment with John's life at John's expense.
Answer:
my mf teacher made us write an essay ( 2 btw) in 1 frickin hour are you kidding me?!
Explanation: