270 Scientific Intelligence. 
miles from Kilauea. In this district the subsidence of the land was 
distinctly marked. Throughout-a coast li any miles in 
feet inland, and carrying with it huge boulders and angular masses 
of rock of from a ton to three tons in weight. e sea rose nearly 
thirty feet in perpendicular height, or ten feet higher than the great 
earthquake wave, already described in your Journal, of the 2nd 
April, 1868. Several houses which were not reached by that wave 
miles. This makes 368 miles per hour, or 540 feet per second, 
about half the nominal velocity of a cannon-ball. On the 23d of 
ber, 1854, a similar wave was transmitted across the entire 
entirely distinct from the tidal swing of the ocean, and are propeT 
