ON MAPPING THE SURFACE OP THE MOON. 



273 



Direction. 



Character. 



Objects and Eemarks. 



W.S.W.-E.N.E. 



2. Upheaval 



W.S.W.-E.N.E. 



3. Depression. 



W.N.W.-E.S.E. 

 W.N.W.-E.S.E. 



W.N.W.-E.S.E. 



W.N.W.-E.S.E. 



W.N.W.-E.S.E. 

 W.N.W.-E.S.E. 



1866. 



1. Depression. . . 



2. Depression on 



a line of up- 

 heaval. 



3. Upheaval . . . 



4. Upheaval and 

 depression. 



5. Depression . . . 



6. Upheaval ... 



S.S.E. No. 5, and also crossed by the N.E. 

 wall of Albategnius, which is identical 

 with the line of upheaval and depression 

 W.N.W.-E.S.E. No. 2, at the point of cul- 

 mination IV A^ ^^. It is not unlikely that 

 the two uphea^-ing forces, whether contem- 

 poraneous in their action or otherwise, pro- 

 duced great disturbance in the north part of 

 Albategnius, the result being the large 

 group of craters in the south part of the 

 area IV A^. The two main lines of disturb- 

 ance are clearly W.N.W.-E.S.E. No. 2, 

 N.N.W.-S.S.E. No. 5, of which N.N.W.- 

 S.S.E. No. 5 appears to be the most recent. 

 IVAf^fi, lYAi7\ IVAf32^ IVANS'. 



This line of upheaval is interrupted by 

 the line N.N.W.-S.S.E. No. 5, and east of 

 that line it cui-ves into S.S.W.-N.N.E. No. 

 5. It forms a curve across the formation 



IVAf25 



IVAf9^ IV A^^ n"Af2», and the crater- 

 row IV A< 'MV A^ '9. 

 It would almost appear that this line of 

 depression was due exclusively to the out- 

 break that produced IV A^ ' and its sur- 

 rounding group of craters; but the line 

 W.S.W.-E.N.E. No. 2 being in exactly the 

 same direction, in fact a continuation of it, 

 and not only so, for this sameline iscontinued 

 W.S.W. past Plalley, and E.N.E. on the 

 N. W. border of Ptolemaeus, it would rather 

 appear that the whole line of upheaval and 

 depression resulted from the operation of a 

 force that exerted itself over a much greater 

 extent of area. 



IV A^ '», IV Af 51^ IV A^ '", IV A^ '^ 

 IV A^^'', IVAf«2. 



This line has been interrupted by the line 

 N.N.W.-S.S.E. No. 5. It is formed of 

 Schmidt's crater-rills Nos. 355, 354. 

 IVAf-*9, IVAf26. 



Nos. 2 and 3 appear to be portions o the 

 same line of fault ; No. 3 being slightly N.E. 

 of the continuation of No. 2, which indeed 

 is continued on the N.W. side of HaUey. 

 IVAf32^ IVANS', IVAfs^ IVAf93, 



IV Af". 



This appears to be of small extent and 

 confined to the second point of upburst on 

 the "Ray from Tycho." 

 IV A^^ IV A^*, IVAf^ and the S.E. 



mouth of the valley IV A^ ^*. 

 IV A^^^ IVAfso^ IVAf28^ IVAf«', 



IVA^'N. border, IV A^'^ 



