OBSERVATIONS OF LUNAK OBJECTS. 79 



may have boon thrown out, producing a brighter streak, extending eastward 

 as well as westward. The most interesting circumstance connected mth 

 this streak is its conformity in direction to that of the south border, as if 

 some peciiliarity of the surfece existed in the neighbourhood of No. 5, of a 

 depressed character, which received the outflow or outthrow of the ejecta. 

 Another noteworthy circumstance is, that this streak was not recorded 

 caiiier than May 13, 1870. 



1870, September 6. Mr. Gledhill records Nos. 1, 3, 17, and 30 as bright 

 disks, also that definition was good, and that the streaks and spots seemed to 

 stand out in rehef. 



18G9, November 15. Mr. Gledhill writes : — "The spots Nos. 1, 17, and 3 do 

 not appear as a mere white s^jof on the floor of Plato would do. There is a 

 sharpness and clearness of contour and a brightness (uniform) of surface 

 which could only belong to a crater or peak. I have often been struck with 

 this. This remark appHes to them whenever they are well seen. I can 

 only liken them to the small round disks of bright stars seen in the transit- 

 instrument. Spot No. 4 never looks like Nos. 1, 17, or 3." To this I append 

 the following query : — Do the clearness and sharpness of the contour of spots 

 Nos. 1, 17, and 3 result from seeing the shadowless interiors of the craterlets? 

 If so, on what agency does the appearance of the mere white spots depend ? 

 Do Nos. 1,17, and 3 vary in this respect with good states of our atmosphere ? 

 Mr. Pratt records a spot new to him on the N.W. of 3, about half as far from 

 3 as is 4 on the opposite side, and aligning with 3 and 4 ; he speaks of it as 

 exceedingly small. I have numbered it 29. He also observed spot No. 8, 

 which he describes as fainter than 29, and situated about one third the dis- 

 tance from 3 towards 4. On this evening Mr. Pratt very carefully scru- 

 tinized No. 3 and its immediate neighbourhood ; the following are his notes 

 transmitted to rac : — " First. The second spot, which I have always ob- 

 served with 3 (and which I learn from Mr. Birt I have always placed in the 

 same relative position as has Mr. Dawes, who discovered it, and of whose 

 alignment I was before quite unaware), is exceedingly close to 3 on the 

 N.E. I estimate the distance at 2", and its position with respect to 1 was 

 very carefully judged to be 145" to 150°, reckoning from S. round by E., 

 which I afterwards found by comparison to be about the angle represented 

 in my former sketches. Second. A third spot, S.E. of 3, and twice as far 

 from it as Mr. Dawes's, was observed. Its relative size was judged to be 

 one fourth, while that of the second spot was one third of 3. The direction 

 was from 3 towards 4." [This spot I take to be 8.— W. E. B.]. "Another 

 lieculiarity in 3. was, that it was just included by the light streak, but still 

 (piite on its edge, as was also its smallest companion. I now determined 

 very carefully the colour of the immediate localities of cdJ spots visible. After 

 independently noting it for each spot, I found on summing up that the 

 whole were upon the light streaks, with the exception of No. 1, around and 

 towards which the light streak was softly shaded off." 



1870, July 9. Mr. Whitley glimpsed spot No. 17 with difllculty. 



Interval 9G to 108 liours. 



1870, April 12. Mr. Gledhill records Nos. 1, 3, and 30 as bright circular 

 disks, 1 7 as a bright disk, also 6, but seen only once or twice. Mr. Pratt records 

 No. 1 as very dense and bright, 3 and 4 as hazy, and 16 and 22 difficult. 



1870, May 12. Mr. Gledhill records Nos. 1, 3, and 17 as fine bright disks, 

 No. 4 a spot, but seldom seen. Marking a, Mr. Gledhill records as the 

 brightest, and Mr. Elger mentions the part east of No. 16 as veiy bright 



