We have flown five hundred miles south of the temperate zone over the light side of the Moon and here we have come upon the big crater, the largest on the Moon. Here our graph registers a temperature of one hundred forty degrees. Dr. Johnston wants to get a good closeup view of this big crater, so Bob is lowering into it. A strange incident is taking place. While we are over the big crater and circling it, our instruments quit working. Bob has gained altitude and is crossing the ridge of the crater to see what has happened. Now the instruments are all working again. We tried this several times, each time with the same results. We also noticed a strange vibration which must have been caused by some sort of a radiation. It wasn't radioactivity for we have instruments for that purpose, but whatever it was, it was strong enough for us to distinctly feel. From our low elevation we can clearly see the mountains within the crater as well as the sides of the crater and they are purely volcanic, not meteoric. There is a lot of lava rock lying all around. Then too, if a meteor had hit here the bottom of the crater would be flat, at least partially flat. There wouldn't be any mountains standing up within it. This same condition exists in all the other craters we have seen. According to the legends of the Moon which we have been told by the natives, it seems that this side of the Moon had violent volcanic eruptions in the long ago past, yet they weren't solely of lava either, for the formations in some of these craters show a resemblance to ground conditions in Yellowstone Park, which could have been hot water craters at one time. Now we are approaching another crater among the mountains pretty well ahead. I don't believe it can be seen from the Earth with any telescope for there are too many high mountains around it. This one has vapor, like steam coming out of its center, yet we can see no water in it. Here the graph registers a temperature of one hundred sixty degrees and there is an indication of moisture in the atmosphere while up till now the air has been entirely dry. In spite of the intense heat we would land now, if we could, just to investigate this crater. There is a large plateau which looks as though it might be sand but it is dotted with jagged rocks six to ten feet high. Neither George nor Bob believe that we could successfully land. So we will have to let this one go by. The chieftain tells us that water is there, very hot water, and that which we see is steam coming out of the crater. According to their history, there was water in all these craters at one time that was hot. This bore out what we thought it was. He says there still are occasional heavy eruptions upon this side of the Moon. That is why nobody ever settles here.