The reafon 1 imagin to be this, when they are felz'd with 
this violent Hest an i Diforder, which for the moft part 
happens in, the T^^ight, they fteal privately over-board inio 
the Sea.jmagining they're going intotht green Fields. And 
this I take to be the reafon we fee fo fe\v,tho I have heard 
. frequently m the Mcditcrmfjean in SumnfCr time, and ve- 
ry hot Weather, of Seaircn loft in the night, which tl:e 
Sailers took for granted were gone off upon fuch like oc- 
caOons unobferved. And I remember very well, thi^ per- 
fon v/as :i£l:ualiy gv^ng over-board , when oiie of 
his Brethren, who fafpefted his dcfign , as he told me, 
caught hold of him juft as he was going to leap off, call d 
for help, and fecur'd him by this Accident. 
This Diftemper. I am of opinion is what we call a Phrenic 
t//,occaftoned by a more than ordinary EfFervefcence and 
heat of the Blood, which difiradting and confounding, if 
not inflaming the Animal Spirits, the proper and irnmcdi. 
steMinifters of the mind^is the caufeof all thofe irregular 
iiiOtions, violent Explofions and Convulfions. Hence 'tis 
the Animal Idea's aieconfns'd, the Imaginatioi) deprav'd, 
and all the rational Funtiions diforder'd. From thefe 
Orgafms in the Animal Spirits, we may, I fancy, give fomc 
account of the want of Pulfe too, their conltant and im- 
petuous Motions through the f ibres, not admitting any 
diflind Arterial Vibrations And perhaps Fhleboton^y 
did not fucceed at llrft, becaufe the Orifices contracting 
prtfenrly. prevented its Effofion, and probsbly the thick- 
iiefs of the Blood concurrd not a little in this Ph^fnomc- 
non. Bb caiiing out for the green Fields,the true Criterion 
of this Dilcafe., I take to be niym the violent heat he v/as 
thtn in, which made him fancy green Fields and open Air 
to cool himftdf in at that time, the Ship being top warm 
for hiro under thefc Circumftances^ for want of Air,. And 
laftly, Calentures happen oftner by Kight than by day^ 
bccaufe our Ships are moft ciofely (hut up by Night, and 
are left airy than they are in ifae day time. 
IL Carigueya, 
