18 REPORT 1867. 



diameter, or 500 toises* (3200 Eng. feet), and 80-90 toises (between 500 

 and 600 Eng. feet) high (Les Mondes, 1st Aoiit 1867, p. 566). Also, in a 

 letter to W. T. Lynn, Esq.t, he says, "1867, Mai 10. Phase diirch 

 Calippus und Hadley. Eiir Linne stand also die Sonne erst wenige Grade 

 hoch. Linne sehr veriindert, an seinem Orte ein auflallend heller Schatten- 

 werfender Hugel halb so gross als der erste nordN\estlich henachbarte Crater. 

 Es ist sicher eiue neue Veriinderuug eingetreten." 



Translation. — The terminator through Calippus and Hadley. On Linue 

 the sun Avas therefore only a few degrees high. Linne was much altered ; in 

 its place a remarkable bright hiU casting a shadow, half as large as the 

 nearest crater on the north-west [I E'^ ^]. A new change has undoubtedly 

 taken place. 



1867, May 10. Respighi saw the little crater on an obscure ground. In 

 his resume of his observations, Eespighi assigns a diameter of 4"'0 to this 

 crater and a great depth. 



1867, May 10. Mr. Ingall, with a 4-5-inch Dialyte, power 200, saw the 

 small crater " very faint, only as an ' aspect' or ' idea' of a small crater in the 

 centre." 



" 1867, Mai 11. Scdmidt. Linne als weissc Wolke: darin ein fciner weisser 

 schatten-werfender Punkt, ohne der gcstrige Hiigol. Audi in y Posidonius 

 sehe ieh einen feinen schwarzen Punkt." 



Translation. — Linne like a wh^te cloud : in it a delicate white point casting 

 a shadow, without the hill noticed yesterday. I also see a delicate black 

 point in y Posidonius. 



1867, May 11. The small crater was seen by Messrs. 

 Knott, with iuterior shadow intensely blacl: 



HxjGGiNS, Tery shaiply defined. In centre nearly, but rather nearer 

 the west margin. Mr. Huggins adds, "The appearance suggested 

 that the bright walls of the crater were a little elevated above the 

 ' nebulous light.' " 



Mr. Iluggins's observations, with engraving of the white spot and crater- 

 opening, will be found in the Monthly Notices of the Eoyal Astronomical 

 Society, vol. xxvii. pp. 290 to 298. 



" 1867, Juni 9. [Schmidt] Linne cine unscheinbare Lichtwolke : in ihr, 

 etwas westlich, ein fciner hcllerer Hiigel, fast schon ohne Schattenspur." 



Translation. — Linne an insignificant light cload : in it, somewhat west- 

 erly, a delicate brightish hill, now almost without tiace of shadow. 



1867, June 9 & 10. Messrs Browning and Barnes, with a silvered glass 

 reflector {With) 8|-inch aj^erture, power 225?, saw a white nucleus on Linne, 

 which Mr. Browning regarded as a hill, 



brighter than the adjacent surface of the M. Serenitatis. I recorded its brightness as 3°"1, 

 that of the northern crater being 5°. See also Schmidt's observations on Aug. 2Q, jjost, 

 pp. 19, 20. 



* On Jan. 25, Herr Schmidt recorded a delicate black jioint, and east of, and close \o 

 it, a fine white summit. The diameters of these he respectively estimated at 2C0 and 

 300 toises ; he did not give the height of the summit. Linne at the time being under tlio 

 evening illumination, the positions of these objects were such as a small crater would 

 present, the enlightened exterior rim being east of the dark spot. If the objects were the 

 interior and rim of the crater seen afterwards by Secclii, and recorded as a remarkable 

 hill by Schmidt on May 10. Schmidt's estimates on Jan. 2b and May 10 agree as to the 

 diameter of the crater. This diameter, up to May 10, appears, from Schmidt^s and 

 Secohi's estimates, to have been under 0"'6. 



t All the following remarks by Herr Schmidt are taken from that letter, which bears 

 date, Athens, 1867, August 23. 



