6 REPORT 1867. 



border of the Mare Sercnitatis. Observed Linne at Hamburg ■with a good 

 telescope ])y Banks. With power 88, it was represented as a very small 

 crater. 



" 1843, Mai 9. Abends ; zunehmende Phase schon iibcr den Copernicus 

 hinaus. Bei vorziiglich gutcr Luft ziihlte ich am zuletzt-genannten Fernrohre 

 22 Crater im Mare Sereuitatis, daruntcr in Nr. 270 sicher den Linne." 



Translation. — May 9, evening. Morning terminator already passed over 

 Copernicus. The air being particularly favourable, I counted with the last- 

 mentioned telescope 22 craters in the Mare Serenitatis, and amongst them in 

 No. 270 is certainly included Linne. 



" 1843, August 17, um 13 Uhr ; am grosseu Fernrohre der Hamburger 

 Sternwarte beobachtet bei guter Luft. Beide Bergadern von Sulpicius Gallus 

 nach Norden zichend, an der abnehmenden Phase, gut siehtbar,aber vom Linne 

 keine Spur (Nr. 32(3)." 



Translation. — Axigust 17, about 13 hours; observed in good atmosphere 

 with the great telescope of the Hambm-g Observatory. The two mountain 

 veins running northerly from Sulpicius Gallus were well visible on the evening 

 terminator, but of Linne no trace. 



Eecent Observations — Results. 



1°. An ill-defined white spot, not unlike a cloud, greater in extent than the 

 crater of Lohrmann, Beer and Miidler, and Schmidt. 



2°. A large shallow crater that has been very rarely seen. 



3°. A small crater within the shallow crater, first seen as a crater by Father 

 Secchi on Feb. 11, 1867. 



These appearances of Linne have not been recorded previously as co- 

 existing*. 



Observations of the White Spot. 



These have been very numerous. No doubt whatever has been cast on 

 this appeai'ance of Linne since Oct. 15, ISfiG. The only question that exists 

 has reference to the variability or invariability of its size, and probably of its 

 reflective power. 



ScrorrDT's Recent Observations. Note. — It will be sufficient to quote 

 merely the dates of these observations except the fii-st, in which Schmidt 

 speaks of his missing for the first time the crater-form of Linne. 



" 1866, October 16. Abends; zunehmende Phase iiber den Caucasus. Luft 

 sehr still, schwach dunstig. Viele kleine Crater im Mare Sercnitatis sichtbar ; 

 Linne aber, obgloich hochst giinstig beleuchtct, erschien nicht als Crater, 

 sondcrn als kleine Wolke, iihnlich dem wcissen Flecken (istlich bei Posidonius 

 in der grossen Bergader, welcher Fleck (in Wiiklichkeit cin grauer lioherer 

 Gipfel jener Bergader) in Lohrmann's Sect. III. mit 16 bczeichnet ist, bei 

 Madler aber y heisst. Zum Ersten Male vermisste ich den Linne, odcr vicl- 

 mehi' seine Craterform, die sich jetzt ticf beschattet, imd in besonderer 

 Deutlichkeit htitte zeigen miissen." 



Translation. — 186.6, October 16, evening. Morning terminator over Cau- 

 casus. Air very still, slightly misty. Many small craters visible in the Mare 

 Serenitatis ; but Linne, although most favourably illuminated, did not appear 

 as a crater, but as a small cloud similar to the white spot eastward near 

 Posidonius in the great mountain-ridge, which spot (in reality a grey highish 



* 1867, Nov. 3. Mr. Prince, of TJckfield, saw the shallow crater and the small crater at 

 the same time : see post, p. 13, 



