10 REPORT—1862. 
represented by the German selenographers. The sketch accompanying this com- 
munication, taken at Hartwell, on Sept. 18, 1862, under the evening illumination, 
exhibits the general characters of the northern depression, viz. a floor pierced by a 
line of eruption (a common feature in several lunar forms), a nearly continuous 
rampart on the east and west sides, rising into a considerable mountain mass at the 
north angle marked B by Beer and Midler, pierced by the crater Horrebow, and 
connected by the steep rocks that form the north boundary of the plateau. It is 
proposed, in accordance with a suggestion by Dr. Lee, to designate this depression 
“ Herschel II.” 
Beer and Midler thus describe the table-land :— 
“ South-easterly of Horrebow is a large plateau, fourteen German miles broad, 
and from twenty to twenty-five German miles long, appearing less from foreshort- 
ening. The western border stretches from the western corner of Horrebow to that 
of Pythagoras, and is rather steep. An offshoot from the same stretches to Anaxi- 
mander. The southern boundary is denoted by the crater Horrebow B (+58° 9’ Lat., 
and —42° 0’ Long.), the northern boundary by two craters e and f Pythagoras. It 
rises on the east, in three great steep mountains of a very dark colour, straight up 
to the plateau, and only faint traces extend from thence still further towards the east. 
The most southerly of these three mountains is 919 toises high, while all three of the 
mountains appear to be exactly similar to each other in height, form, and colour. 
“The surface of the plateau itself has, besides several craters,—among which 
Horrebow A (+58°40' Lat., and —45° 30’ Long.), 2°67 German miles in diameter, is 
the largest, deepest, and brightest,—only a few scarcely perceptible ridges, and may 
accordingly be considered as an actual level. But whether this landscape, containing 
nearly 200 square German miles, is to be distinctly recognized as one connected 
whole, depends very much upon illumination and libration.” 
It is proposed to designate this table-land “ Robinson,” in honour of the 
Astronomer of Armagh. 
The following description of the same table-land is taken from the author's 
observations, dated London, 1862, March 12, 6" to 10" 30" G. M. T., moon’s age 
12413, morning illumination. Instrument employed, the Royal Astronomical 
Society's Sheepshanks telescope No. 5, aperture 2°75 inch. 
“ South of the crater or depression Herschel II. is another, well defined, but not 
so large. Between the two is a table-land, in which at least five craters have been 
opened up. Two are ina line with Horrebow ; both are given by Beer and Midler ; 
the northern one is marked B [Horrebow B], the southern is undesignated. The 
principal crater in this table-Iand is marked A by Beer and Midler [Horrebow Ali 
the three form a triangle: the two remaining craters are near together, and nearly 
east of A; the largest is marked d by Beer and Midler, the othere. All the craters 
are shown on the map. _[ Note.—The crater d is referred to in the foregoing trans- 
lation as f Pythagoras; Beer and Midler thus speak of it :—“ Through an oversight, 
the lettering Pythagoras d occurs twice on our map; once for a slightly depressed 
crater on the edge of the previously-described plateau.” ] 
“The table-land lies nearly in the direction of the meridian: the mountains on 
the north slope, or rather their rugged and precipitous slopes, dip towards the large 
crater Herschel II.; while those on the south Fthe three dark mountains before 
mentioned] dip towards the other and smaller crater, which it is proposed to 
designate ‘South.’ On the west the table-land abuts on the border of the Mare 
Frigoris, while on the east it extends to some mountain-ranges beyond Anaxi- 
mander.” 
[The reader will notice a discrepancy in the descriptions as regards the points 
of the lunar horizon. It was thought better to leave each description as given 
by the writers, rather than attempt a conversion of them; especially as future 
observers can decide upon which they will adopt, consistent with the principles 
of lunar topography. 
The form of fis table-land before described is irregular. In the sketch it appears 
to be confined to the area between Herschel II. and “ South,” and this is the most 
conspicuous portion of it; but on the night of the 31st of January, 1863, under the 
morning illumination, it was seen to extend to the north of a crater then coming into 
sunlight eastward of “South,” which it is proposed to designate “ Babbage.” A 
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