le ring-plain of regular form, with low walls and
dark interior, on which there is a central peak, difficult to detect.

FRANKLIN.--A ring-plain, 33 miles in diameter, which displays a
considerable departure from the circular type, as the border is in great
part made up of rectilineal sections. Both the W. and N.E. wall is much
terraced, and rises about 8000 feet above the dark floor, on the S. part
of which there is a long ridge. There is a bright little isolated
mountain on the plain E. of the formation, and a conspicuous craterlet on
the N.W. An incomplete ring, with a very attenuated border, abuts on the
S. side of Franklin.

CEPHEUS.--A peculiarly shaped ring-plain, 27 miles in diameter. The E.
border is nearly rectilineal, while on the W., the wall forms a bold
curve. There is a very brilliant crater on the summit of this section,
and a central mountain on the floor. The W. wall is much terraced. W. of
Cepheus, close to the brilliant crater, there is a cleft or narrow valley
running N. towards Oersted.

OERSTED.--An oblong formation with very low walls, scarcely traceable on
the S.E., except when near the terminator. There is a conspicuous crater
on the N.W. side of the floor, and a curious square enclosure, with a
crater on its W. border, abutting on the N.E. wall.

CHEVALLIER.--An inconspicuous object enclosed by slightly curved ridges.
It includes a deep bright crater. On the N. is a low square formation and
a long ridge running N. from it. Just beyond the N.E. wall is the fine
large crater, Atlas A, with a much smaller but equally conspicuous crater
beyond. A has a central hill, which, in spite of the bright interior, is
not a difficult feature.

ATLAS.--This, and its companion Hercules on the E., form under oblique
illumination a very beautiful pair, scarcely surpassed by any other
similar objects on the first quadrant. Its lofty rampart, 55 miles in
diameter, is surmounted by peaks, which on the N. tower to an altitude of
nearly 11,000 feet. It exhibits an approach to a polygonal outline, the
lineal character of the border being especially well marked on the N. The
detail on the somewhat dark interior will repay careful scrutiny with
high powers. There is a small but distinct central mountain, south of
which stands a number of smaller hills, forming with the first a circular
arrangement, suggestive of the idea that they represent the relics of a
large central crater. Several clefts may be seen on the flo