(;i5) 
to be met with about the Heart ; the laft in the All 
three here defcribed by the Author , who alfo compares, as 
Harvey does , the Fcetus yet in the Womb with the man- 
ner of operation of thofe Animals, that are provided but with 
one cavity in the Heart, and with no Lungs ; the bloud of the 
fruit , as long it is unborn, paffing neither through th e Paren- 
chyma of the Liings, nor that of the Liver, Laftly, The ne» 
cefHty of Rejpiration is explicated, and how the defeat of 
Lungs, and of one of the Ventricles of the Heart, is fupplied 
in Fijhesj vi\, by comminuting and mixing the Bloud in the 
Gilh' To which is annexed the manner of Refpiration in Am- 
phibia s, which are furniflit with Lungs and two Ventricles of 
the Heart, and yet, if Bartholin misinformes us not, keep the 
Foramen Ovale all their life timeopen 5 which yet our Author 
calls in queftion, alledgingj to have ken no Diving Animals, 
which had not the faid Foramen clofed after their being 
born. 
The Sixth makes a digreffion,to difcourfe of the Biolychmum 3 
and the Ingrefs of the Air into the Bloud, for the Generation 
of Spirits, and the pretended kindling of a vital Flame. But 
our Author can fee nothing that may prove either the exiflence , 
or the neeejjity offuch a Flame : Gn the contrary, he finds the 
Bloud unfit for taking Fire, and judge th it very difficult to af- 
fign either the place or the manner of this accenfion ; which is 
not made in the Lungs, nor in the Heart, which he holds to be 
deftitute of all ferment.To which he adds,/r/?,that the Heat of 
the Bloud is not fufficient to caufe fuch an inflammation, feeing 
how much even good Spirit of Wine mu ft be heated, before ’it 
will flame, which it doth not without the actual application of 
fire. N^jThat Examples are very rare of Liquors kindled by 
ventilation. Further , That FfJhej an d Frogs, which yet have life, 
moticn 3 and fenfe, are not thought to have this flame, as being 
a&ually cold. Befides , That the Animal Spirits are not found in 
the form of flame s which he endeavours to prove from the 
Willi fan do&rine of the manner, in which they are in the 
Brain fevered from the Bloud. Lajlly , That it is doubted by 
fome, whether any Air at all is received into themafs of bloud, 
which yet is not queftioned by our Author 5 who only doubt- 
