Xll. ABSTRACT OF PROCEEDINGS. 



VI. Special public requirements : — 

 a. Necessities: — 



1. Lighting. 



2. Sanitation. 



3. Water-supply. 



4. Public-baths and boat-sheds. 



5. Refreshments. 

 6. Luxuries. 



1. Games, etc. 



2. Music. 



3. Statuary. 



2. "A possible connection between Volcanic Eruption and 

 Sunspot Phenomena," by H. I. Jensen (communicated 

 by Professor David, b.a., f.r.s.) 

 The author of this paper mentions that the idea of the 

 existence of such a connection was suggested to him by 

 the fact that Vesuvius was in violent eruption in the years 

 1813, 1822, 1855, 1867. 1891, and 1900, all of which were 

 minimum years. By means of a chart he shows that 

 earthquakes and eruptions are most violent, numerous, 

 and extensive when there is least sunspot activity. Though 

 seismic disturbances do occur at all times, they seem for 

 the last one hundred and twenty years to have been most 

 severe around the minimum years: — 1811, 1822,1833-4, 

 1844, 1855-6, 1867-8, 1878-9, 1888-9, and 1900-2, large 

 groups of great earthquakes and eruptions having taken 

 place in and about these years. On the other hand the 

 chart also shows that in years of maximum, like 1893-8, 

 1884-5, 1869-71, 1858-65, and so on, these phenomena 

 have been comparatively few and unimportant. 



The writer thinks that the cause of this connection 

 between solar and seismic disturbances, is that in years of 

 sunspot minimum there is less heat, and other energy, re- 

 ceived from the sun, and consequently there is more rapid 

 radiation from the earth, causing quicker cooling, hence 

 more cracking of the earth's crust. He also suggests that 

 the earth's atmosphere exerts a greater squeeze on the 



