Your book, When the Tide Goes Far Out, conveyed much information about tides. Now I know one difference among a meal tide and a spring tide. A spring tide is higher. I said to Mr.Pitts,"Some students wondered if tides were related to the swaying of Earth in space?" He said,"No, tides mainly result from the Moon's gravitational pull on Earth." During our last two summer holidays, my sister and I took a trip to Nova Scotia, Canada. The greatest tides in the world, we heard, are in the Bay of Gundy between Maine and Canada. Last Tuesday, Mr.Pitts explained that at low tide water retreats, uncovering many fascinating sights. He said,"You can see crabs, starfish, urchins, clams, and many varieties of seaweed. "A hermit crab, for example, employed