56 BIBLIOGRAPHY OF ASTRONOMY: 1887. 



San<apot8 — Continued. 



Brothers (A.) Comparison of drawings and photographs of sun-spots and tho 

 sun's surface. Proc. Manchester lit. & phil. soo., 26 : 74-78. 



Brotv-n (E.) Kemarkable sun-spots [1886, May], il. J. Liverp. astron. soc, 

 5: 50. 



Jacquot (M.) & Bkugttiere ( — ). [Distinguished a group of 3(5 spots with the 

 naked eye, 1887, Dec. 19.] L' Astron., 7 : 33. 



Landerer (J. J.) Grande tache solaire de Juin 1887. il. Ibid., 6 : 308. 

 Markwick (E. E.) Some typical sun-spots, il. J. Livern. a>tr(Mi. soc, 5: 



144-146. 

 Measures of positions and areas of spots and faculye ... on photographs taken 



... at Greenwich, in India, and in the Mauritius. Greenw. speetrosf. 



obsns. 1885 : 34-104. 

 SpOrer (G. F. W.) Periodicitiit der Sonnenflecken scit dem Jahre 1618, vor- 



nehnilich in Bezug auf die heliographische Breite derselben, und Plinwt-is 



auf eine erhehliche Storung dieser Periodicitiit wiihrend eines langen Zeit- 



raumes. Vrtljschr. d. astron. Gesellsch., 22: 323-329. 



Beobachtungen von Sonnenflecken in den Jahren 1880-84. Pub. d. as- 



trophys. Obs. zu Potsdam, 4 : 219-427 (Bd. 4, Stiick 4). Also: Pvcprint. 



(M. 10.) 

 Tacchini (P.) Observations solaires du deuxieme seraestre, 1886. Compt. 

 Pvend., 104: 216. 



Same, l^-" trimestre, 1887. Compt. Kend., 104 : 1082; 105: 210. 



Same. 2« trimestre, 1887. Ibid., 105: 211. 



Same. 3» trimestre, 1887. /6iV/., 105: 1002. 



Osservazioni di macchie e facole solari [4" trimestre, 1886]. Atti d. r. 



accad. d. Lincei, s. 4. Rendic, 3 : 14. 



Same. 1* trimestre, 1887. Ibid., 2Q5. 



Macchie solari osservate a Iloma nel 1886. Mem. soc. spettrscp. ital., 16: 



1-3. 



Macchie e facole solari osservate al regio osservatorio del coUegio Eomano 



nel 1» trimestre del 1887. Ibid., 33-36, 54-57. 



Same. 20 trimestre, 1887. Ibid., 87-90. 



Same. 3" trimestre, 1887. Ibid., 118. 



Taches solaires a colorations rouges. L'Astron., 6 : 59-62. 

 Veeder (M. A.) [Spots visible 1886, Nov. and Dec] Nature, 35: 584. 

 Wolf (Pv.) [Statistics for 1886.] Vrtljschr. d. astron. Gesellsch., 22 : 164 

 Sun (Statistics of faculse, prominences, spots, etc., for 1886). 



Kicco (A.) Osservazioni astrofisiche solari eseguite nel regio osservatorio di 

 Palermo: statistica delle macchie e delle facole nell' anno 1886. Mem. soc 

 spettrscp. ital., 16: 11-16. 



Solar activity in 1886. Obsry., 10 : 197-199. 



Tacchini (P.) Distribuzione delle protuberanze idrogeniche alia superficie del 

 sole durante I'anno 1886. Atti d. r. accad. d. Lincei, s. 4. Rendic, 3 : 117. 



