upon the Phenomena, of Earthquakes. 337 
96. Secondly, The times in which the earthquake arrived at 
different places, agree perfectly well also with the same point. 
And, : 
97. Thirdly, The interval between these, and the time of the 
arrival of the subsequent wave, concur in confirming it. That 
all this might appear the better, I have subjoined the following 
table, assuming the point, from whence I compute, at the distance 
of about a degree of a great circle from Lisbon, and a degree and 
half from Oporto. In consequence of this supposition, I have 
added three minutes to the interval between the time when the 
shock was felt at Lisbon, and at the several other places. The 
first column in the table contains the names of places; the se- 
cond, the distances from the assumed point, reckoned in half 
degrees; the third, the time that the earthquake took up in tra- 
yelling to each, expressed in minutes; and the fourth contains 
the time in which the wave was propagated, from its source to 
the respective places, expressed in minutes likewise. 
Halfdeg.) Min. | Min. 
TISHONA aleve sos 
2 3 12 
ODOREOF cre stern acel (visi Bad. 
Ayamonte....... 6 53 
RN ig aay casas 9 12 82 
TE rs ie 9 11 
CRDEOMAR £ «pins teal «ih 18 
Madeita. watssescie wat BS 25 152 
Mountsbay ......| 20 267 
Plymouth’ . ass 41410. 2h] 360 
Portsmouth .... 23 29 
Hingsale io.» arae =) of uae 290 
SWANSEA ai sisi= ters aus need 530 
The Hague......|. 30 32 
Wochness,? Face; xalavel uboe 66 
Antigua. v0 ee0s| 98 965 
Barbadoes ....../ 101 485 
98, In 
excepted) are taken from the 49th volume of the Philos. Trans. and the 
Hist. and Philos. of Earthq. ‘To these I must refer the reader for the par- 
ticular authorities, which, as they are very numerous, I was not willing to 
quote at length. 
* It appears, by all the accounts, that the interval between the earth- 
quake and wave, either at Oporto or Lisbon, was not long: I have met with 
no account yet, however, which tells us how long it was at the former, and 
only one which mentions it at the latter, where it is said to have been nine 
minutes. [See Memoires sur les Tremblemens de Terre, p. 245, compared 
with Hist. of Earthquakes, p. 315.) These intervals, if we knew them ex- 
7 
Vol. 52. No. 247. Nov. 1518. actly, 
