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dorifique,'others Diuretique, fome Alterative, fome Cordial, 
fome Opiate ; what is the fimilitude or diffimilitude of the 
parts in the agent and patient^ what their pulfioa and reafti- 
on 5 by whatkind of ftrugling or fertnencation they, when 
inixr,are ftirred,and by what mechanifm or power they pro- 
duce their feveral efFefts ? Which things he conceives are not 
duly folv'dby the vulgar dodrine, importing, that Medica- 
meets do work and exert their peculiar powers by certain 
fpecifique verrues^ thisfolutionexplaioing idem per idem ^ 
and fpeaking no more than that e.g, fome medicaments are vo- 
mitive, becaufe they are endued with a faculty or power to 
make the Patient vomit. Wherefore, to fatisfie intelligent 
Readers,he undertakes by a kind of Mechanical way to (hew. 
How Medicins work upon our Bodies^ fo as to make them, at 
pleafiire^tocaufe or flop excretions, toraife or allay ebulliti- 
ons, to remedy the diftempers and to remove the diford.rs 
of this or that partjC^^r* In the doing of which he j5r/?, in re^ 
ference to the operations of medicinesjdiftinguifhes thePlaces, 
in which they do chiefly exert their vejtues, which are eithr 
the prima vis^or the Mafs of blood with the vijcera beloogir/g 
thercto,oMhc Brain and the Nervous Syftcme> with their ap= 
purtenances. Secondly coofiders the Immediat SubjeUs^ on 
which the medicines operate3 which are either tht Af^imal 
Spirit f^oi the Humors: Itk refped of whieh he teaches, that 
Phyfick taken inwardly does work e//Aer immediately upon r 
the Animal Spirits, fuch as lodge in the fibres of the Gullet, ^ 
StomachjBowels and other channels in thepr/«?^ 5 or by 
means of the Blood upon thofe that refvde in the Brain or the 
Fibers of farihtr diftaot parts. When the vertue of medicines 
reaches to either of thefe^they either provoke them to excre- 
tory motions5(?r enlarge and r^freft them, or allay their difor- 
der, i?r affwage their fury* As to^he-H^^^^/^ on which ttie 
Medicaments imprefs their vertues, they are ihe Fermeoi&of 
the Stomach and Gutts^as alfo the Blood with the Nutritious 
Juice, and th^ recremcnts,as the Serum, the Bile, the Pancre- 
atick juice, the Lymphatick and Nervous liquor ^ on which 
cither iingly, or plurally, Medicines do work divers way s^ei- 
ther by precipitating them, or by reducing them from that 
ftate 5 fometimes by rowfing them wheahzy,or by affwagmg 
