O'Reilly — On the Dates of Volcanic Eruptions. 



407 



Unfortunately Kluge's list of eruptions has not been published (so far 

 as I know), and Mallet's list is mainly concerned with earthquakes. 



Had Kluge or Poey given a chronological list of the eruptions of 

 certain volcanoes, and allowed comparison of their dates with those 

 of the sun-spot period of Wolf, perhaps more attention, and certainly 

 more acceptance of a connection between them, would have been 

 insured. It is therefore from this point of view, that I propose to 

 present the question, and, selecting a certain number of volcanoes, to 

 give a list of their eruptions, and place the date of these in comparison 

 with the sun-spot periods as given by Wolf in his list. It will be more 

 convenient to give this list at once, so that it can be referred to when 

 necessary, marking also the intervals between the different successive 

 dates mentioned therein, and noting the minima by -(" minus,") 

 and the maxima by + (plus). 



Date. 



Interval. 



Date. 



Ir 



terval. 



Date. 



Ir 



iterval. 



- 1610-8 





4-7 



- 1712 





6-2 



- 1810-5 





5-6 



1615-5 



+ 



3-0 



1718-2 



+ 



5-3 



1816-1 



+ 



7-1 



- 1619 





7-0 



- 1723-5 





4-0 



- 1823-2 





6-3 



1626 



+ 



8-0 



1727-5 



+ 



6-5 



1829-5 



+ 



4-3 



- 1634 





5-5 



- 1734 





4-7 



- 1833-8 





3-4 



1639-5 



+ 



5-5 



1738-7 



-1- 



6 3 



1837-2 



+ 



6-8 



- 1645 





4-0 



- 1745 





5-0 



- 1844 





4-6 



1649 



+ 



6-0 



' 1750 



+ 



5-5 



1848-6 



+ 



7-6 



- 1655 





5-0 



- 1755-5 





6-0 



- 1856-2 





4-0 



1660 



+ 



6-9 



1761-5 



+ 



5-0 



1860-2 



+ 



7-0 



- 1666-9 





8-1 



- 1766-5 





3-4 



- 1867-2 





3-5 



1675 



4 



4-0 



1769-9 



+ 



5-9 



1870-7 



+ 



8-3 



- 1679-5 





5-5 



- 1775-8 





3-7 



- 1879 





4-8 



1685, 



+ 



4-5 



1779-5 



+ 



5-3 



1883-8 



+ 



5-8 



- 1689-5 





3-5 



- 1784-8 





4-2 



- 1889-6 





5-3 



1693 



+ 



5-0 



1789 



+ 



9-5 



1894-9 



+ 





- 1698 





7-5 



- 1798-5 





5-5 









1705-5 



+ 



6-5 



1804 



+ 



6-5 









