and exhalations^ fmce a ftench, that hath tainted vfell water after 
an Liniifual manner, hath upon the fame account been generally 
reckoned amongft the figns of an e^rth^mke^ by which it may be 
predicted : for by this it was that Pherecydes is faid to have pre- 
faged the e^,rt,':t^fiake of Lacedemon ^eind HeltKont mentions another 
who pretended to the fame forefigbt, bytafting the water of a ve- 
ry deep weH in the Caflle of Lbva^tr. 
5 But to proceed to the earth^mks it felf and to defcribe its mo- 
tion, it was not of that fort, which are termed pulfes or fttccHjfions\ 
fuchas llrike the ground at yi^k angles with a violent (hock or in- 
termittent knocking, fo as oftentimes to raife the earth to a confi- 
derable height, or force their way by a breach \ it appears rather 
to be a trembling motion : yet was it not of that fort of tremors that 
are called IncVmers^ fuch as ftrike the earth at acute angles^ o> a- 
Hope, fuce as make it to lean fideward, like a (hip that is under 
fail (toufean old comparifon) andconfequently fuch as frequent- 
ly overthrow buildings, and work mifchiefs of that uature: But 
this which \ am defcribing was of a third fort of eanhc^uakes^ ac- 
cording to the general diftindion, fuch as vibrate and (hake with- 
out altering the pofition of the earthy and leave all things in the 
fame pofture in which they found them. For it (hook the earth 
with a tremulous and vibrating motion, whofe reciprocations 
were repeated with a great deal of quicknefs. The pulfes ( I 
mean fuch asmuftof ncceflity be in all vibrating motions) were 
as I could perceive a little difcontinued, and yet they came fo thick 
that I could not count them, tho the whole emh^ua^e continued 
here fcarce more than 6 zds of time, and when ^hat ended the 
motns refiltutionlsy or fettling of the building in which I was, did 
feem to be with a crafh. 
6 Now as tremulous and vibrating motions are proper to pro- 
duce founds, fo was this earth^fia^e accompanied with a hollow 
murmuring found, likediftanc thmder^ as lhave obferved before, 
which found kept time fo exactly with the motion, and was fo 
conformable to it inallrefpeds, that it^iainly appears, there wasi 
the fame reafon for both : Nay this found was varied by the very! 
fame accidents^ that the trembling was ; for to thofe that were with-; 
indores it appeared to be more confiderablci and as it were in thcj 
air above, occafioned chiefly by the (baking of the building, a5j 
wemayguefs by a blow or ftampin a room, which befides thdj 
principal found from the part that is ftrncken, caufes anotheH 
obfcu re one, together with afmall fhaking throughout thewholejl 
And 1 doubt not but fuch founds and (bakings may be diverfly mojf 
difiedi 
