O'Reilly — On the Dates of Volcanic Eruptions. 425 



" Encyelopsedia Brit." on Yesuvms, and also from Phillips' monograph, 

 on "Vesuvius," 1869, which seems to be very complete in this regard. 

 It has seemed unnecessary to give the intervals between successive 

 years subsequently to 1694, as the succession is thenceforward nearly 

 continuous, and the numbers being given by "Wolf's list renders their 

 consideration superfluous 











Estimated 





No. 



Date. 



Interval. 



Sun-spot 



— 











Year. 





1 



63 A.D.l 



= 63 



15-65 



+ 62 ?? 



— 



2 



79 ,, Aug. 



24 = 78-65 



124-35 



- 78-65 ? 



— 



3 



203 „ 



. = 203 



269 



- 202-0 ? 



— 



4 



4722 ,, 



. = 472 



40 



+ 472? 



— 



5 



512 „ 



. = 512 



173 



- 512? 



— 



6 



685 „ 



. = 685 



308 



+ 683 ? 



— 



7 



993 ,, 



. = 993 



43 



+ 993? 



— 



8 



10363 _ 



. = 1036 



13 



+ 1035-5 ? 



— 



9 



1049 



. = 1049 



89-9 



+ 1049 ? 



— 



10 



1138-9 .. 



. =1138-9 



167-1 



+ 1138? 



— 



11 



1306 .. 



. = 1306 



194 



+ 1305-5 ? 



— 



12 



1500 



. = 1500 



130-97 



- 1500 ? 



Wolf's List 

 Numbers. 



Difference. 



13 



1631 Dec. 16* . 



. = 1630-97 



29-53 



/+1626 \ 

 (-1634 / 



4-97 

 3-03 



14 



1660 July 



. = 1660-50 



21-12 



+ 1660 



0-50 



15 



1682 Aug. 12 . 



. =1681-62 



3-38 



- 1679-5 



2-12 



16 



1685 .. 



. = 1685 



4 



+ 1685 







17 



1689 .. 



. = 1689 



4-27 



-f 1689-5 



0-50 



18 



1694 April 13 



. = 1693-27 





+ 1693 



0-27 



19 



1696 July 



. = 1695-50 









^ Promontory convulsions. 

 2 Covered all Europe with fine ashes. 

 E.I. A. PUOC, SEE. m., VOL. V., 



3 First discharge of liquid lava. 

 1 The crater disrupted. 



2 H 



