410 



THE GEOLOGIST. 



her ocean waters ought to be drawn up on this, and not the other 

 side. We do not mean to say there is no water there, because all 

 the water and nearly all the air which is left on the moon, some 



astronomers tell us, is there, kept back by the mountains. Thus 

 — the features of our moon being very highly exaggerated, of course, — 

 that is to say, the water (shaded in the diagram) on the invisible face 

 of the moon, and the atmosphere (dotted) above, do not exceed in 

 height the level of the lowest valley in the mountain-ridges which 

 keep them back. There may be a little water remaining in the ocean- 

 cavities on the side we see (a little air also), retained by the angular 

 position of other ridges, which keep them back (as at a b, c d). Such 

 are the views some take, while all map out great spaces and call 

 them seas, — Mare Nubium, Mare Humorum, Mare Tranquillitatis, 

 Mare Serenetatis, Mare Imbrium, and Oceanus Procellarum. But 

 they do not tell us what has become of the water that once was in 

 them. " Gone to the other side." Gone against attraction ? — No. Will 

 Professor Phillips, who is doing Lunar Geology as well as Terrestrial, 

 tell us 1 Will any Oxford scholar tell us — divine or scientific 1 



When Mr. Airy lectured at the great Manchester Hall, a few weeks 

 since, he said — 



"The following diagrams (Nos. 2 and 3) are by Professor Plantamore, who 

 went from Geneva to the east coast of Spain. As the moon entered on the right, 



