366 Geological Society : the Rev: R. Everest's 



experienced, of apparently equal force, at St. George's, about fifty 

 miles to the south-west, and at Graciosa, about the same distance to 

 the north-west of Praya ; but only the earthquake which destroyed 

 that town was felt, though not powerfully, at the capitals of Pico, 

 sixty-eight miles south-west, and of St. Michael's, the same distance 

 to the south-east. At Fayal, eighty-five miles west by south, and at 

 the eastern end of St. Michael's, 105 miles south-east by east, no mo- 

 tion was perceived, as far as Mr. Consul Hunt had been able to ascer- 

 tain. If the shocks felt about 30 minutes past 3 o'clock on the 

 morning of the 15th of June, in the several islands, be divided into 

 four degrees of intensity, each interval, the author says, will be 

 found to contain a distance of about seventeen miles, the eastern 

 end of Terceira being on the first degree, or seventeen miles from 

 the centre of eruption ; the western end thirty-four miles ; Graciosa 

 and St. George's fifty-one, and the capitals of Pico and St. Michael's 

 sixty-eight miles. The latter places, equally distant from the centre 

 of eruption, experienced shocks of equal degrees of diminished 

 force. 



Mr. Consul Hunt then alludes to Buffon's notice of submarine ex- 

 plosions between St. Michael's and Terceira, attended by earthquakes 

 in those islands, and the appearance of newly formed islets ; also to 

 the throwing up of Sabrina, near St. Michael's, in 1811*, the effects 

 of which were powerfully felt in that island, but not in Terceira, 

 fifty miles distant ; and, on account of these phaenomena, he, in 

 conclusion, advises mariners to keep a sharp look-out for shoal water 

 on approaching Terceira from the eastward. 



A paper, entitled " Some Geological Remarks made in a Journey 

 from Delhi, through the Himalaya Mountains, to the frontier of 

 Little Thibet, during 1837," by the Rev. Robert Everest, F.G.S., 

 was then read. 



The author's route, after quitting Delhi, lay through Seharun'- 

 pore, the Keeree pass in the Sevalik hills, and Mussoori to the Jumna, 

 thence nearly north-west to the valley of the Paber, as far as Roo- 

 roo, where it quitted the course of that river and crossed the moun- 

 tain range to Rampore. It then ascended the valley of the Sutluj 

 to the Leo River, and terminated near the Khealkhur Fort, on the 

 frontier of Little Thibet. The country consists of alluvial deposits, 

 the tertiary strata of the Sevaliks, a vast sandstone deposit, an ex- 

 tensive clay-slate formation containing limestone and sandstone, 

 various metamorphic rocks, greenstone and granite. 



Delhi is situated on the most northern promontory of an extensive 

 sandstone formation, which stretches many miles in a south-west and 

 south-east direction, following the course of the Jumna, and re- 

 sembles, in mineral characters, the transition quartzose sandstones 

 of Europe. It alternates, though rarely, with layers of soft talc slate, 

 and a few miles to the southward of Delhi with clay slate. To the 

 south-west, a little beyond Goongony, and in other localities, sienitic 



[* An original letter on the elevation of Sabrina appeared in Phil. Mag., 

 S. 1. vol. xxxviii. p. 229, and a reprint, from the Philosophical Transac- 

 tions, of Capt.Tillard'8 narrative respecting it, in vol. xxxix. p. 451. — Edit.] 



