1903.] Solar Prominence and Spot Circulation, 1872 — 1901. 451 



by Father A. Fenyi, S.J., who has published* the individual observa- 

 tions, and the reductions of the positions and frequency of promin- 

 ences observed at Haynald Observatory for the years 1884 to 1890 

 inclusive. He gives curves constructed somewhat after the manner 

 adopted in the present enquiry, as illustrated above, in fig. 1. A. com- 

 parison of the points of maxima from his curves with those of Tacchini 

 and Eicco and Mascari for the period common to all three sets of 

 observations is made in the following tables, each hemisphere being 

 given separately. The vertical columns show, for each year, the 

 heliographic latitudes of the points of maxima, and an asterisk (*) is 

 placed against the one which is the more or most prominent in each 

 hemisphere ; when there' are two, and they are of equal intensity, this 

 symbol is attached to each, while in the case of only slight indications 

 of maxima the latitude is enclosed in brackets. 



Northern Hemisphere. 





1884. 



18S5. 



1886. 



1887. 



1888. 



1889. 



1890. 





* 



# 













Tacchini .... 



50, 25 



45, 25 



45, 20 



35 



35, 15 



40 



45 



















Eicco and 



55, S) 



55, 15 



45, 25 



30 



35 



45 



45 



Mascari 





* 















65, 45, 15 



45, 25 



45, 20 



45 



40, 20 



43, 25 



45 



Southern Hemisphere. 





1884. 



1885. 



1886. 



1887. 



1888. 



1889. 



1890. 



Tacchini . . 



(75), 25, 5 



25 



35, 20 



45, 25 



* 



45, 25 



45 



45 













# # 







Ricco and 



(85), 25, (5) 



25 



35 



45, 25 



50,25 



45 



50 



Mascari 







# # 





# 







Fenyi .... 



(75), 35, 15 



(50), 35 10 



35, 10 



50, 30, 15 



50,25 



40 



50, 20 



It will be seen that for these seven years, Fenyi's results are in very 

 close accordance with those deduced from the other two series of 

 observations, thus generally endorsing those portions of the curves in 

 Plates 6 and 7 covering this period. 



It was mentioned in a previous paperf that the mean prominence 

 curve for each hemisphere exhibited subsidiary maxima and minima. 

 In the light of the present investigation, it is interesting to compare 



* ' Publicationen des Haynald-Obseryatoriums, Kalocsa,' Heft VI, 1892, und 

 VIII, 1902. 



t 'Roy. Soc. Proc.,' vol. 71, p. 244. 



