ON MAPPING THE SURFACE OF THE MOON. 13 



except on the south-west, where an elevation could be seen brighter than 

 other parts " *. 



3. Jan. 12, 5.15 p.m. The Rev. 3Ie>tit Cooper Key examined Linne 

 Tvith his silvered glass reflector of 12 inches apertiu-e. He says " the air was 

 very tremulous (the temperature had fallen to 22°) ; but still definition was 

 fairly sharp with powers of 250 and 300. At first the appearance was cer- 

 tainly that of a wliitish cloud obscui-ing the crater ; but upon long gazing 

 and using averted vision, I could plainly make out a centre or nucleus, and 

 presently afterwards a marginal ring of perhaps twice the diameter of the 

 original Linne." — Astronomical Register, No. 50, Feb. 1867, p. 33. 



4. Feb. 14. Mr. Geoveb, with a 2-foot Gregorian Reflector, 4-in. aper- 

 ture, powers 50 to 75, saw the ring of Linne faint, plainest on the preceding- 

 side, very obscure on the following. His observation is thus recorded : — 



" I saw the ring of Linne ■with certainty, though but faint ; it was much 

 the plainest on the preceding side, and I was tolerably certain of an interior 

 shadow ; bo this as it may, the interior floor was certainly seen, and very 

 dusky, * * the following side of the object is very obscure." 



5. April 11. Rev. T. W. Webb saw the ring faintly. He says, " With 

 close attention I once or twice thought I saw the ' Ghost,' described by Mr. 

 Knott as a pale ring, about as large perhaps as that figured by B. and M., a 

 little brighter than the included or exterior surface." — Intellectual Observer, 

 No. 64, May 1867, p. 282. 



6. May 10. M. Respighi. — Leg Mondes, 13 Juin 1867. " Dans certains 

 moments ou Pair etait parfaitement tranquillc, le contour de la taehe blanche 

 paraissait forme par le couronnement d'un grand cratere a petite iDrofondeur. 

 Le bord de la tache paraissait mieux defini du cote oriental que dans les 

 autres parties, et avcc quelque trace d'ombre." 



Translation. — In certain moments, when the air was perfectly tranquil, the 

 contour of the white spot appeared formed by the crown of a large crater of 

 little depth. The border of the spot appeared better defined on the eastern 

 side than on the other parts, vnth. some trace of a shadow. 



7. July 8. Mr. Huggins. " Ou the evening of July 8, when a great part 

 of the light reflected from our atmosphere was removed by means of a Nicol's 

 prism placed next the eye, I observed a shadow within the western margin 

 of the shallow crater." — Monthly Notices, vol. xxvii. p. 296. 



8. Oct. 18, 16** 30'". Mr. Buckingham saw several small projecting points 

 of the old ring, and describes the ring-summit of the white spot as verij white. 



9. Nov. 3, 5'' 5™. L.M.T. Maresfield, Sussex. Capt. Noble saw the shallow 

 crater complete. The following is an extract from his notc-book : — 



"For the first time I see Linne unmistakeablj' as a crater, with an im- 

 doubted dein-essiou in the interior of the ring. The bottom of the crater is 

 very light, in fact practically identical in tint with the surrounding Mare ; 

 but Linnaeus is a rinrj surely enough * * * It has a good deal of the effect 

 of the annular nebula (57 M) in Lyra. The S.W. part of the ring is the 

 thickest portion of it. I first detected these appearances with a power of 

 154, and subsequently used one of 255 ; but this only rendered them more 

 indubitable. Nothing resembling the dark spot seen by Mr. Huggins on the 

 11th of last May (Monthly Notices, vol. xxvii. p. 296) could be detected." 



10. Nov. 3, 5"^ 30". Mr. C. L. Prince, of Uckfield, saw the large sliallow 

 crater of Linne ivell defined, and the smaller crater as a black point. The 

 observation is thus recorded : — 



* See ante, p. 8, 1837, Oct. 18, when Mr. Buckingham saw the white spot convex. 



