60 Occultations. 



to compute this epoch accurately, but it may assist our pre- 

 paration to observe, that two evenings previous to such a 

 presentation, the E. side of the great crater Hercules (5) will 

 be upon the terminator, which will pass through Plinius (13) 

 the next day. 



In addition to the valuable information contained in our 

 last number, our readers may be glad to have the precise 

 wording of the original observations laid before them, as far as 

 they lie within my reach. Schroter, 1788, Nov. 5, describes 

 the course of his 6th ridge in the Mare, from a small crater on 

 the S. shore (b Snip. Gall. B. and M.) northward to another 

 somewhat uncertain one v, <c about equally large, but quite flat, 

 appearing like a white, very small, round speck," and thence 

 to g, " a not sharply- defined dark spot, which during that 

 observation had only some i° light, and consequently struck 

 the eye as considerably darker than the rest of the plain, and 

 was somewhat indistinct, from lying very close to the termina- 

 tor." The choice of the site of Linne lies between these 

 two ; from a comparison of Schr.'s drawing with B. and M., 

 I incline to v ; and should this be correct, its appearance 

 then was not very unlike its present, excepting that he makes 

 no mention of the whitish cloud. — In Lohrmann^s Section IV. 

 (1824) and his map (1822 to 1836) it is a distinct crater. In 

 his text it is stated that he measured its position, and that it 

 has (C a diameter that amounts to somewhat more than one 

 (German) mile, is very deep, and can be seen in every illumi- 

 nation." — B. and M. call it "the deep crater Linne;" they 

 measured its position seven times, gave it 1*4 mile in breadth 

 and 6° of brightness, and remark that it is ill-defined in full 

 moon ; but without any mention of the white cloud which is 

 now so conspicuous in high illumination.* 



OCCULTATIONS. 



Feb. 9th, /i Piscium, 5 mag.,' 7h. 38m. to 8h. 35m.— 12th, 

 6 1 Tauri, 4i mag., 12h. 50m. to 13h. 38m., its companion 6 2 , 

 4J mag., 13h. 0m. to 13h. 32m. B. A. C. 1391, 5 mag., 13h. 

 37m. to I4h. 26m. (worth sitting or getting up for) . — 13th, 

 111 Tauri, 6 mag., llh. 2m. to 12h. 6m. 117 Tauri, 6 mag., 

 12h. 45m. to 13h. 35m. — 16th, 29 Cancri, 6 mag., 12h. 13m. 

 to 13h. 19m. 



* [Having several times looked at Linne with a very fine 6! -inch reflector by 

 Browning (with AVith's mirror), we should have preferred calling its present 

 appearance a w7iitish spot. Ifc does not, to our eyes, sufficiently differ from other 

 whitish spots to be distinguished from them as a " cloud." — Ed.] 



