The Planet Saturn. 199 



slopes rapidly from s to e; "to tlie riglit tlie ' roof protrudes 

 over tlie shadow as it did last j^ear ; but now it overlaps both 

 rings at m and n. The whole of this upper part of the / 

 shadow is black, and darker than the rest, though the lower 

 part is darker than the ring C, and well projected on it. 

 Near its E. edge the shadow seems to be separated from the 

 'roof'' by an inlet, i n, equal in depth to 4- of c d, or even 

 more." Ball does not seem to encroach upon division : S. C. 

 [18, not at all : S. 0. At greatest opening, division never seen 

 in full breadth beyond S. limb : Dawes.] 1 7, roofless prominent, 

 encroaching very slightly on A ; point r fainter than rest of 

 shadow: S. 0. 18, roof decidedly blacker than shadow below 

 it, but edge m n, till now abrupt and well-defined, seems to 

 blend more gradually with division. p corner rather darker than 

 before : S. C. 20, inlet seems rounded off on N. side ; roof 

 blacker than rest of shadow ; m n again as sharp as ever ; p 

 shadow seems less prominent : S. C. 25, roof-like appearance 

 noticed; p well seen: B. II. 27, limb appears straight across 

 B, probably from its dark shade there ; inlet rounded off and 

 shadow faint at r ; outline on B [by diagram] bent at an angle 

 with that on dusky ring : S. 0. 27, 29, De la Rue's second 

 engraving brings s (Fig. 5) down to e, and makes s m a little 

 convex; an ear like Fig. 2. projection on division not shown, 

 the latter being black; shadow on B slightly concave, on C 

 straight, and in a fresh direction; general effect, however, 

 very similar. 31, curve of shadow expressly reversed; ring 

 appeal's not plane : Secchi. April 1, never so perfectly defined 

 before; powers to 1561; a narrow shadow over S. pole unites 

 faint shadow p to black /; it is not the division unless 

 refracted, because the two make an angle upon A at their 

 junction. Hoof concave to shadow near division in which it 

 gradually disappears, without overlapping A or B; inlet rounded 

 off, with some faint shade adhering; see Fig. 6: S. C. 2, 

 " V ombre est assez curieuse, elle est renversee el ondulee ;" Fig. 4 : 

 Secchi. 4, curve reversed; a little shadow on A : ditto. 5, p 

 shadow darker than division into which it blends ; roof does not 

 appear to project ; in darker than rest of shadow, as black as 

 open ansa ; / follows regular curve of limb on B and C ; inlet 

 quite narrow, but deep as ever, and seems not rounded off: 

 S. 0. 19, shadow irregular. 25, remarkable discontinuity at 

 division : Secchi. — 1 857, Jan. 1 , almost exactly in opposition, no 

 shadow visible except projecting ears crossing division, one on 

 each side : Jacob. Jan. 13, shadow on B not black : B. II. 30, 

 /"shadow black, covering A except a narrow line: B. II. p 

 concave and very faint ; / black, pretty regularly curved on A, 

 straighter on B and ; Feb. 11, /follows curve of ball on B 

 and 0, turns off abruptly on A: S. C. 12, faint shading^, 



