402 Proceedings of the Royal Irish Academy. 



liigli, now it only attains to 5000 feet. (Compare with Krakatoa in 

 1883 (1883—1772 = 111 = 100 + 11)). 



[Page 46.] " Moreover, the terrible phenomena of the last third 

 of the year 1852 should he here detailed, since they are of so compre- 

 hensive and grand a nature, that if the wide extension and extraordi- 

 nary development in force of subterraneous disturbances he taken as a 

 proof of the existence of a general igneous fluidal earthcore, the phe- 

 nomena in question stand out in the front line amongst all the events 

 of this nature which have taken place up to the present." 



[Page 73.] " The days near to the 13th August seem to play a 

 notable part in the history of vulcanism." (Cites a number of cases 

 in proof thereof.) 



[Page 74.] " A summary of all the eruptions marked in my cata- 

 logue as having occurred in August gave the following result. The 

 total having taken place in this month was 67. Of these 11 are not 

 fixed as to the day of the month, 44 occurred between the 1st and 15th, 

 and only 12 from the 16th to the 31st. On the 8th there occurred 

 only 5 ; on the 10th, 3 ; on the 11th, 4 ; and on the 12th, 8 eruptions. 

 It is certainly of significance, that this concentrating of eruptions on 

 the days 8th to 12th August coincides with the Laurentius stream of 

 falling stars. 



" The days, 8th to 13th l^ovember, about which date the November 

 stream of shooting stars occurs, shows also the remarkable number of 

 13 eruptions. 



[Page 76.] "The years 1797, 1798, and 1799 are, according to 

 the above citeu tables, minima sun-spot years. They are marked by the 

 occurrence of the following notable eruptions, along with many others 

 of lesser importance. (Cites a number of great eruptions to the point.) 

 The minimum years of the next sun-spot period, the years 1809-12, 

 are likewise notable for a similar aggregation of volcanic phenomena in 

 the "Western Hemisphere. (Cites a series of eruptions corresponding 

 to that period.) 



[Page 84.] Conclusions. 



1. " Certain years distinguish themselves by a remarkable sum of 



generally extensive earthquakes and volcanic outbursts, 

 whilst others are relatively undistinguished in that respect. 



2. " These years, markedly characterised by volcanic phenomena, 



return at comparatively regular intervals such that they 

 seem to be in connection with a mean yearly period of 

 111 years = 11*1 years. 



