quakes occurred at Smyrna, Greece, Bostou (United States) 

 and Constantinople. At Kamtschatka and the Kurile 

 Islands there was an extremely violent earthquake. The 

 sea was greatly agitated, overflowed the land to an extra- 

 ordinary height, and then retired so far that the bottom 

 was visible between the first and second of the Kurile 

 Islands, followed by an eruption of a volcano there. Great 

 changes were produced by this earthquake on the surface 

 of the country. Many level places were raised into hills, 

 and others sunk into chasms. Near the sea, lakes and bays 

 were produced. 



At nineteen year intervals from these critical points in 

 the Nile's curve, it will be found that similar violent earth- 

 quakes have occurred, and the tendency appears to be along 

 or near the same latitudes, if not at the same places. It 

 would be interesting to quote examples in proof of my 

 statements, but space will not permit of this being done. 

 I have, however, prepared complete lists w bh the latitudes 

 of the places where earthquakes have occurred, and these 

 can be seen by anyone interested in the matter. 



Halley's Comet. As this comet will make its appearance 

 in May this year (1910), I thought it might be interesting 

 to show its position on the diagram, as far back as inform- 

 ation is available. The dates have been obtained from the 

 "Encyc. Brit." to the year 1 156, and those visitations which 

 occurred previously to that year, from Hind's " Past History 

 of the Comet Halley." 1 The positions of the comet on the 

 diagram depend upon the assumption of 171 years' perio- 

 dicity for the Nile's curve. 



The disturbance of the comet's period of revolution from 

 time to time, through planetary perturbations, has spread 

 the positions of its visitation pretty well all over the 

 diagram, from which it would appear that, if the earth's 



1 Monthly Notices Royal Astronomical Society, vol. x. 



