OF BODIES. Chap. XXX IV. 



i mingling the fubHance of the vefleli in which the humour is 

 conceded, with the humour it felfe : for as if you boyk divers 

 kinds of liquors in brafle pannes, the pannes will tay at the ia- 

 quor with the quaky of the brafle ; and therefore Phyfi dans 

 forbid the ufe of fuch, intheboylingof feveraJl medicines ; fo 

 much more in a living creatures body, there can be no doubt, 

 but that the vefleli in which any humour is concoded, doth give 

 t tin6ture thereunto. Now concoction confining in thefe two, 

 it is evident, what the concodive vertue is; to wit, heate,and the 

 ipecificall property of theveffcll which by heate is mingled with 

 the humour. 



There remainc yet, the retentive and the expul five faculties ^ 



to be difcourfed of 5 whereof one kind, is mani tcilly belonging Concerning 

 to the voluntary motion whish we have declared : namely that the retentive 

 retention, and that expulfion, which we ordinarily make of the and 

 grofle excrements either ofmeate, or of drinke, or of other 

 humcurs , either from our head , or from our ttomacke, or 

 from our Lungs ; for it is manifestly done, partly by taking 

 in of wmde , and partly by comprefling of fbme parts and 

 opening of others : as Galen fheweth in his curious book dtttfk 



An other kind of retention and expulfion : in which we have 

 no fenle when it is made (or if we have,it is ofa thing done in us 

 without our will, though perad venture we may voluntarily ad- 

 vance it ) is made by the fwelling of fibers in certaine parts, 

 through the confluence of humours to them, (as in our ttomack' 

 it happeneth,by the drink and the juice of themeate that is in ir} 

 which fwelling , clofeth up the paffages by which the contained 

 iubftance mould go out (as the moy ftening of the (trings, and 

 mouth of a purfe, almoftfhuttethit) until! in fome C for ex- 

 ample,the rtomack,after a mealej the humour being attenuated 

 bylittleand little, oetteth out fnbtilely ;andibleavinglefTe 

 weight in the ftomack ^the bag which weighcth down lower,then 

 thencather Orifice at which thedigefted meate iflueth , rifeth 

 a little : and thh rifing of it is alfb furthered i>y the wrinkling 

 up and mortiring of the upper part of the ftomack ; which ttij 

 returneth into its naturall corrugation, as the mafle of liquid 

 meate leaveth foaking it(whi<*li it doth by degrees, ftill as mr re 

 and more ?;octh out : and fo what remaineth fillcth leffe pi =ce, 



j * _-, . * 



Dd 4 and 



