270 



REPORT — 1866. 



Direction. 



Character. 



Objects and Remarks. 



S.byW.-N.byE, 



S.byW.-N.byE. 

 S.byW.-N.byE. 



S. by W.-N. by E. 

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

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

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



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



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



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



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



1. Depression . . , . 



2. Upbeaval and 



depression. 



3. Upheaval and 



depression. 



4. Upheaval . . . . 



1. Depression and 



upheaviil. 



2. Depression and 



upheaval. 



3. Upheaval and 



depression. 



4. Depression and 



npheaval, 



5. Depression . . . . 



1. Depression and 



upheaval. 



2. Depression and 



upheaval. 



IV A" f"*, IVA-^ss, IVA«i2^ IV A"' 7^ 



This line is continued in area IV A'' across 

 Halley; it intersects S.S.W.-N.N.E. IV A^ 

 No. 8 in the mountain IV A^^^, and merges 

 into IV A" ^2 and IV A"'?, 

 IV A"", IVA«i», IVA»32. 



IV A- 37, IV A'' ■'^ IVA«>8, IV A^'"!. 



The three lines which differ slightly in 

 their inclination to the meridian all eon- 

 verge to the nioimtain IV A^ ^9. 

 IVA«35, IV A'' 39, IVA«50, and the east 



border of RhEeticus. 

 IV A'' 7, IVA«2*, IVA«29, IVA-^^s^ 



IVA-^^', IVA«^ 

 IV A" 2^ IV A"^ 27^ IV A" ^^, IV A"' ^\ 



IV A" 28, IV A'' 73^ IV A" '«, IV A" '9, 



IV A'' 84^ rVA^^S. Also the lucid spot 



IV A'' 71. 



These three lines are parallel with and 

 close to each other, and agi'ee in direction 

 with three somewhat similar lines in area 

 IV A^ on the opposite side of Ilipparchus ; 

 viz. S.S.W.-N.N.E. IV A^:' Nos. 8 and 9. 

 See Table, p. 272, and the low hills on the 

 N. W. side of the valley IV A^ 27. The middle 

 lineS.S.W.-N.N.E.No.2of IV A'' andNo, 9 

 of IV A^, can be traced on the S.S.W. in the 

 direction of the crater C and ring d of B. & 

 M. on area TV A*^. 

 IVA"2o, IVA«i3, IV A""^ IVA^=^ and 



the west border of Ilalley. 

 IVA»32, iVAi'8. 



The close coincidence of directioti of the 

 lines of depression and upheaval on the 

 N.E. and S.W. sides of Hipparchus appears 

 to point to a more recent epoch for the for- 

 mation of the floor than that at which the 

 mountainous border was produced, and the 

 very general direction S.S.W.-N.N.E. of 

 the lines of disturbance in this part of the 

 moon points to a still earlier epoch, when 

 the surface was dislocated in lines running 

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

 IVA'^'^IVA'^32^ IVA"-i2, ivA-'^s, 



IV v^" 7, IV A" 22, IV A" 23, IVA''^'. 

 IVA'^-'i, IVA''32_ IV A" '2, iVA'^so^ 



IV A'"-'', IV A" 28, IV A" 26, IVA<^24^ 



IVA«52, ivA«". 



These lines form a range of cliffs which 

 is parallel with the line W.N.W.-E.S.E. 



