388 REPORT—1868. 
II.— ADDITIONS TO AREAS IV A’, IVA’, AND IV AS, WITH 
IDENTIFICATIONS OF OBJECTS IN THESE AREAS, 
The requirements of selenographical research render it necessary that con- 
siderable attention should be given to the discovery of new objects not yet 
inserted in maps or catalogues, as well as the identification of those already 
recorded. If “fixity” is to be established or “ change” detected, in either 
case it must be by constant and systematic observation, the only means by 
which the invariable character of an object may be ascertained and apparent 
changes eliminated, or by which it may be discovered that changes which 
seem to be only apparent are of such a nature as to lead to the suspicion, 
and, if well founded, the ultimate detection of real change. The objects re- 
corded in Areas [LV A*, IV A®, and IV A¢ are mostly taken from Rutherford’s 
photogram, 1865, March 6, and are consequently brought up to that date. 
In a few cases the dates are later. The identification of objects fixes their 
characters to the dates of observation, which in those of Areas IVY A* and 
IV A$ are mostly in the autumn of 1867. Those of IV A? are in the spring 
of 1868, some being as late as November 5, 1868. 
Additions to Catalogue. 
. Area LV A*. The numbering of objects in this area in the printed cata- 
logue extends to 88, the following have been added since. 
89. A craterlet at the mouth of Lohrmann’s valley, Sec. I. 87. 
This craterlet is on the 8.W. border of Reaumur, near the line of cliffs 
TV A*8, 
90. A ecraterlet between IV A“t and IV A*!® nearest IV A*!6. It was 
first seen with Mr. Barnes’s silvered glass mirror on June 10, 1867. 
91. The western interior slope of Reaumur. 
92. A short mountain-chain §.E. of and nearly parallel with TV A*!, 
93. A craterlet just E. of IV A*4, discovered by the Rev. W. O. Williams, 
1867, October 17. Estimated at 2-0; mag. 0-11. 
94, The north part of an extensive depression between two low ridges, 
the western of which stretches northward from the mountain IV A$ *6 to the 
mountain IV A*28, The eastern in like manner extends from IV A¢ * to the 
mountain-arm on which IV A¢* IV A*!7 is situated. See IV As 1”? et seq., 
post, p. 40. 
95. The north part of the western ridge. 
96. A ridge just north of IV A**4, extending from ITV A*7 to TV A*7, 
The depression and ridges were discovered (1867, Dec. 23) on De La Rue’s 
photogram, 1858, Feb. 22, by W. R. Birt. 
97. A eraterlet in TV A* 58; diameter 3’°17, mag. 0-18. 
98. A craterlet in TV A*58, N.N.E. of TV A*97; estimated diameter 1-5, 
mag. 0:09: 
99.. A valley extending from TV A* * to 1° S. lat. between IV A*# and 
yA, 
The dotted line on Area IV A‘, between the crest of [TV A* # and the W. 
side of the valley TV A*58, I find on Rutherford’s photogram to be a subordi- 
nate ridge on the slope upwards to the W. side of the valley IV A**®, 
100. A cleft at the W. foot of IV A* 4, 
This cleft was discovered by Mr. G. J. Walker of Teignmouth. Writing 
under date of 1868, Feb. 1, he says, “The lower part of IV A**, or the foot 
of the ridge, always looks to me like a sort of continuation of the cleft IV A* *7, 
or like along ravine communicating with it.” 
101. A shallow valley between LV A*4 and IVA “4, §, of TV A**. 
