408 SHUDIES FOR STUDENES 
the first “paper of this) series.) For the” most) part ‘these are 
well-known earthquake regions, though the results have been criti- 
cized on the ground that certain well-known seismic regions, such 
as California, Andalusia, Lake Baikal, and New Zealand, are not 
indicated, while Newfoundland and the Indian Ocean are. As 
regards this objection, it should not be overlooked that regions of 
high seismicity may not necessarily be regions of equally frequent 
macroseisms, and the brief period that the method has been in opera- 
tion removes much of the force of the objection so far as the seismic 
regions not indicated are cencerned. As regards Newfoundland, 
the ‘“‘oval” of Milne merely grazes its corner and is centered over 
the steep wall of the ocean deep at the margin of the Great Banks. 
As this scarp is off the lane of transatlantic steamers, direct observa- 
tion of submarine quakes should in any case be seldom made. We 
find, however that on September 27, 1838, the ship “La Claudine,” 
Captain Blount, while in this vicinity (Lat. 31° 4o’ N. and Long. 42° 
to’ W.) experienced a most severe series of shocks which lasted three- 
quarters of an hour. Occurring in the night and in perfectly clear 
weather, everyone was aroused and rushed on deck believing the 
ship was going down. Nearly all the breaks in the Atlantic cables 
occur at this wall, and on October 4, 1884, the three cables running 
here in parallel lines, about ten miles apart, were simultaneously 
fractured at points opposite each other and in a straight line. 
The other oval of macroseismic origins to which objection has 
been made is likewise seldom crossed by vessels except at its margins, 
but we have here the record that on October 13, 1863, a submarine 
quaking of great intensity, accompanied by rumbling like thunder, 
was felt by a vessel in Lat. 20° S. and Long 67° E. Other severe 
quakes have been felt by vessels near the margin of this oval on 
February 9, 1823, and on January 29, 1882. It seems likely, there- 
fore, that the new method is extending our knowledge of earthquakes 
into regions of which we should otherwise have at best but little 
knowledge, and it confirms the generalization that much the greater 
number of movements within the crust occur beneath the sea and at 
the borders of the great ocean deeps. A map based upon a larger 
series of observations is reproduced after Milne in Fig. 2.1 Milne’s 
1 British Association, Seventy-sixth Report (York, 1906), Plate I. 
