y large depressions. On the broad massive N.E.
border, the bright summit ridge and the many transverse valleys running
down from it to the floor, are especially interesting features. There are
very clear indications of "faulting" on a vast scale where this broad
section of the wall abuts on the N. side of the formation.

CYSATUS.--A regular walled-plain, apparently about 28 miles in diameter,
forming the most northerly member of a chain of formations, of which
Newton, Short, and Moretus, extending towards the S. limb, form a part.
Its border rises nearly 13,000 feet above a floor devoid of prominent
detail.

GRUEMBERGER.--A much larger and more irregular ring-plain, nearly 40
miles from wall to wall, on the E. side of Cysatus. Its W. border rises
nearly 14,000 feet above the interior, which includes an abnormally deep
crater, the bottom of which is 20,000 feet below the crest of the W.
wall, and several small depressions and ridges. The inner E. slope is
finely terraced.

MORETUS.--A magnificent object, 78 miles in diameter, but foreshortened
into a flat ellipse. Its beautifully terraced walls and magnificent
central mountain, nearly 7000 feet high, are very conspicuous under
suitable conditions. The rampart on the E. is more than 15,000 feet above
the floor, while on the opposite side it is about 5000 feet lower.

SHORT.--A fine but foreshortened ring-plain of oblong shape, squeezed in
between Moretus and Newton. It is about 30 miles in diameter, and on the
S.E., where its border and that of Newton are in common, it rises nearly
17,000 feet above the interior, which includes, according to Neison, a
small central hill. Schmidt shows a crater on the N. side of the floor.

NEWTON.--Is situated on the S.E. side of Short, and is the deepest
walled-plain on the visible surface. It is of irregular form and about
143 miles in extreme length. One gigantic peak on the E. rises to nearly
24,000 feet above the floor, the greater part of which is always immersed
in shadow, so that neither the earth or sun can at any time be seen from
it.

MALAPERT.--A ring-plain situated far too near the limb for useful
observation. Between it and Newton is a number of abnormally shaped
enclosures.

CABEUS.--Another object out of the range of satisfactory scrutiny. Madler
considered that it is as deep as Newton. According to Neison, a central
peak and two craters can be seen within under favourable conditions.
Schmidt draws a long row of gr