ON MAPPING THE SURFACE OF THE MOON. 17 



Translation. — Of this kind are all the more recent observations at this 

 place.^ If other persons now still assert that they see a crater in the place of 

 Linue, this only proves to me that they have quite missed its place ; or, in 

 case they do see a venj delicate crater in the place of Linue, this circum- 

 stance can only confirm the fact brought forward by me. Linue was for- 

 merly a considerable crater, the third in magnitude in the Mare, next after 

 Bessel and Gallus. 



"1867, Feb. 11. [Pabke Secchi.] Le 11, au soir, Liune e'tuit dcja assez 

 avance dans la lumiere et a 7 heures on voyait uettement un trts petit 

 cratere cnvironne d'une eclataut aure'ole blanche qui brillait franchenient 

 surle fond sombre duM. Serenitatis. Le grandeiir de I'Drifice du cratere etait 

 de ^ de seconde au plus, et I'aureole etait un pen plus large que Sid^iicius 

 Gallus." — Comptes Eendus, torn. Ixiv. 25 Pevrier, p. 345. 



Translation. — On the 1 1th, in the evening, Linne had already advanced 

 into the light, and at 7 o'clock a very small crater was distinctly seen, sur- 

 rounded by a brilliant white aureole, which glittered against the dark ground 

 of the Mare Serenitatis. The size of the orifice of the crater was at most -i 

 of a second, and the am-eole was a Little larger than Sulpicius Gallus. '* 



1867, March 14. Mr. Buckingham measured the " cloudy bright patch," 

 and found it to be 6" in diameter. He saw into the small crater, which he 

 estimated to be equal to the largest on and near to the centre of Plato. He 

 saw a slight shadow within the crater on the west side. 



1867, March 15. Mr. Dawes, with power 160 on his 8-inch Cooke, saw 

 "an excessively minute black dot in the middle of Linne." 



1867, March 15. Mr. Buckingham again saw the small crater without the 

 shadow seen on March 14. 



1867, April 10. Respighi saw at sunrise on Linne', and precisely at its 

 place, a brilliant spot or point entirely isolated on an obscure ground. 



1867, April 11. The small crater on Liune was seen by Messrs. 

 Respighi. 



Buckingham, luest of the centre, with the cone leading to it. 

 Webb, who saw the ring of the shallow crater faintly, not at the same 

 time that he saw the small crater, but only in a few doubtful glimpses. 

 HuGGiNs, but only its bright west margin. 



Dawes, who saw the dark spot and bright west edge. Mr. Dawes says, 

 " On the west side there is a little curved edge which looked slightly 

 raised like the edge of a crater.'' 



April 12. Mr. Carpenter, with the Great Equatoreal at the Royal Obser- 

 vatory, Greenwich, saw a crater which he has drawn as on the site of Linne, 

 surrounded by the aureole as described by Secchi. 



In the suitable and favoiu-able evenings of April and May 1867, Pro- 

 fessors d' Arrest and 8chjellerup saw the crater opening in the middle of 

 the large bright and somewhat diffused spot, and estin^ated the diameter of 

 the circular shadow at not more than 0"-9, at the most 1"-1. Prof. 8chjel- 

 lerup adds, '•' I wiU just remark that the crater-opening is not nearly so stri- 

 king as might be supposed from Mr. Huggins's drawing in the June Number 

 of the Monthly Notices." 



1867, May 10. Schmidt saw, in place of the smaU crater, an enlightened 

 mountain, or bright shadow-projecting hill, half the size of the next neigh- 

 bouring crater on the north-west (Linne A, B. & M. ; IE *), of 0"-45 



* B. and M. assign a brightness of 5° to this crater, and delineate it as tarffcr than the 

 northern of the three craters N.W. of Linne, which they do not notice in their t«xt. A 

 is now smaller than the northern crater, and on the evening of Dec. 7, 1867, it was scarcely 

 1867. C 



