412 Scientific Intelligence. 
minous cloud. Be so kind as to make some observations on this locality.” 
The earliest information respecting the crater I received from Mr. 
_ Buckingham, who favored me with a copy of a photograph taken by 
him on November 18, 1866. On this photograph the place of “ Linné” 
is visible, but faint. I have during the Jast lunation received records of 
observations from the following gentlemen: Doctors Mann and Tietjen, 
and Messrs, Talmage, Webb, Slack, Grover, and Jones. On the 13th, 
when the terminator passed over the east boundary of the Mare Sereni- 
tatis, the place of “Linné” was seen by Messrs. Webb and Talmage; 
r. Webb’s aperture 94-inch silvered glass reflector, and Mr. Talmage’s 
10-inch refractor of Mr, Barclay at J.eyton. Mr. Webb described the 
appearance as an ill-defined whitishness on the site of “Linné.” Mr. 
Talmage recorded “a dark circular cloud.” The’ exact position of these 
appearances was carefully ascertained afterward and found to agree with 
Doe 
shadows within them. On the following evening, December 14th, obser- 
vations were made by Messrs. Webb, Slack, Grover, and Birt. A white 
Spot was seen in the position of “Linné.” Mr. Webb described it as 
the most conspicuous object on the east half of the Mare Serenitatis. 
Mr. Slack saw a whitish spot not remarkably bright, but could see no 
trace of a crater. “Mr. Grover recorded “a tolerably defined roundish 
whitish speck,” but he could not see the interior or margin of the crater, 
craters which were well seen.” My own 
with the above. I estimated the light at 8°. On the 15th the spot was 
brighter, and I obtained the measures recorded below. On the 16th 
srs. Jones and Grover described the appearance as a white spot not 
over t. ; 
On the 20th Professor Foérster and Dr. Tietjen observed “ Linné” with 
the Berlin refractor. The following is the translation of the letter which 
I received from Dr. Tietjen, dated Berlin, 21 December, 1866: 
“On viewing the moon last night about 13" M.T. Berlin with our re- 
fractor, In order to convince ourselves of the disappearance of the crater 
‘Linné, Professor Foérster and myself perceived that crater very dis- 
tinctly. If, th fore, an obscuration has taken place, on which certainly 
not appear that either he or Professor Foérster has seen into the crater. , 
The whole of the observations are so accordant among themselves, and 
the measures appended so clearly indicate the white spot to be larger 
than the crater “Linné,” as to leave no doubt that a change of some 
kind has taken place; and this conclusion appears to be supported by 
records which are here appended : 
