14. REPORT—1868. 
In the W. part of the area is a very minor “fault,” IV A? ®, nearly parallel 
with the main fault. 
Levers.—There are only two levels on this area—the higher W. of Hip- 
parchus, and the depressed W. floor of Hipparchus. These levels are sepa- 
rated by the “fault” IV A” TV A8 0 IV A*®, 
Craters.—The probable uncertainty which appertains to the earlier obser- 
vations of the physical aspects of the moon’s surface, by which it is difficult to 
arrive at any satisfactory conclusions relative to alleged physical change, ren- 
ders it not only important but imperative that observations should now be 
conducted with such precision that no doubt may hereafter arise as to the 
real state of the object observed and recorded ; it is accordingly intended that 
the description of each object recorded in the following pages shall be equi- 
valent to a trustworthy and accurate observation; and as such observations 
can be obtained by means of photography, the epoch is that of the photogram 
employed, viz. 1865, March 6, unless otherwise expressed. Among the most 
prominent objects on the moon’s surface are craters. It is in this class of 
objects that change has been suspected. To indicate the precision attainable 
with our present means, a list of the craters on area IV A® is subjoined in the 
order of magnitude, so that, if any question should hereafter arise as to any 
one of them, this record, with the photogram from which it is compiled, will, 
it is hoped, be sufficient evidence of the state of each in the year 1865 on 
March 6; and to prevent any after-misapprehension as to whether these ob- 
jects are actually craters, engravings are given of most of them, with the 
proportions of shadow to illuminated interior, at an epoch which may be ap- 
proximately indicated by the longitude of terminator being equal to 21° E. 
There are very few craters on IV Af forso large an area—only fifteen, and 
most of these but small. Five are found near the fault IV A”™, TV Af 9, 
Ty A“, Nearly all the others are isolated. 
ul ul m- “ ul m- 
(Hy Ivar <...: 1967 17:43 1:17 (9) Tv APA. 2.3. 4-47 0:26 
(2) IV Aft, |... 1119 0-66 (10) IV AF ...... 354 317 020 
e a oe pe es Le oO — se 3-10 an 
Bis 02 625 0-42 (12 ertiae BOD 01 
ye eee 671 447 0:33 (1S) WASH ck) 2:90? 0-17? 
(5) TV... 625 531 032 (14yTV APD... 2-70 0-16 
CAV Ree neces 625 317 0-28 (15) Iv AP2 ,..... 2°70 0-16 
(8) veal bes... 531 3:54 0-26 
The first column of seconds () are measures on the photogram of the 
longest diameters, the second of the shortest diameters. The last column 
contains the magnitudes, the diameter of Dionysius being regarded as unity. 
ee letterpress, areas IV A*, IV AS, p. 9, and Report Brit. Assoc. 1866, 
p. 245.) 
Snquence or Ossecrs.—The continuation of the subzones (see letter- 
press, areas [VY A*, IV AS, pp. 5 and 6) in area IV A® are as under :— 
No. 1. Lat. 0° to 1° S.—1**, 2**, 3**, 29**, 49**, 52**, 4*, 10*, 11*, 
12*, 13*, 53*, 40, 42, 45, 46, 50, 51, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 
90/91, 54, Gh Sine 
No. 2. Lat. 0° to 2° S.—1**, 2**, 3**, 294#*, 44**, 49**, 52**, 4*, 10%, 
11*, 12*, 13*, 39*, 43*, 58*, 20, 32, 33, 40, 41, 42, 45, 46, 50, 51, 54,55, 
56, 57,58, 59, 60, 61, 62, 63, 67, 77, 78, 79, 90, 91, 99, 5t, 6+, 7+, BF, Ot. 
No. 3. Lat. 1° to 3° S.—3**, 14**, 44**, 4*, 10*, 39*, 43*, 20, 26, 27, 
30, 31, 32, 33, 40, 41, 42, 45, 46, 51, 55, 62, 63, 65, 66, 67, 73, 74, 77, 
78, 79, 80, 89, 91, 98, 99. 
