(nSi), 
that arecommofily alleJged 5 it being fuppofed;that this hot and 
moift principle of Life, in its own nature diffipable in the courfe 
of Life, not being perfedly repaired by food^ is confiderably di- 
miniflit, which brings old Age, and is at laft quite confumed, 
which caufeth natural Death 5 where Authors make a great dif- 
ference between the 5^7w/W heat and moifture, and that which 
comes from Aliments 5 fo thzt^fay they^ the former cannot be 
repaired by the latter, as being heterogeneous. Which me 
feems not to be true for^ doth not this Seminal heat and moi- 
fture originally proceed from what is fupeifluous of the thitd 
Concodlion of the Aliments ^ It is therefore of the fame na- 
ture 5 and nothing hinders, but what is diffipated thereof may 
be perfedly reftor'd by good nourifliment, well prepar'd, and ta- 
ken feafonably and in due quantity. Whence it may be juftly 
concluded, that the defeat: of repairing this principle of Life 
comes not from its nature>not reparable this wayjbut from fome- 
thing elfe. 
The illuftrious Bac0n,{ir\&c\% the wcaknefs of this fuppofiti- 
on, did conceive, that this fault came from the inequal reparati- 
on of the liquid or foft, and the dry or more folid parts , which 
jointly ferve to maintain and repair themfelves 5 whence it 
comes to pafs , that the moft eafie to repair, and the moft 
ncceffary for Life, as the Blood 3 ceafe at laft to be fuf- 
ficiently repaired by the defe»fiof the others^ which are not re- 
paired at all. 
SmBorlusy being almoft of the fame fenciment 5 holds , that 
natural Death happens, becaufe the Fibres dofodry up, that they 
cannomoreberenew*d; he making the maintenance of life to * 
depend from the renovation of the parts. Which doth not fa- 
tisfie me neither, becaufe even the Bones themfelves^ which are 
the hardeft parts, are capable of renovation in old Age ^ in regard 
that old Oxen, which we often eat^ have, at certain times { I fay 
not of the Moon, according to the common opinion) their 
Bonesof the fame place altogether dry and m^rrow-lefs, and at 
other timcsbedewed with a fubftance of the nature of marrow , 
wherewith they are then fiU'd, which enlargeth their pores as 
of a fine Spunge, and foftens them 5 which then efpecia- 
ly comes to pafs, after they have fed upon good pafiure 
E s in 
