1From Benjamin Franklin to Sir John Pringle, 10 May 1768 (Franklin Papers)
Printed in Benjamin Franklin, Experiments and Observations on Electricity … London, 1769), pp. 492–6. You may remember that when we were travelling together in Holland, you remarked that the trackschuyt in one of the stages went slower than usual, and enquired of the boatman, what might be the reason; who answered, that it had been a dry season, and the water in the canal was low. On being...