Parts or Ingredients may aft according to their particular and pri- 
ftine nature. 
8. In divers Bodies, that which is call’dor looked upon as the 
Specific k Form 5 is often not fo much as the Prefixing , but only the 
mofi eminent, 
9. The Forms difcourfed of, feem to be rather concurrents than 
fubordinate. 
To each of thefe Proportions are annexed fhort Comments , fill 
of very pertinent and teaching Inftances, Relations, Comparifons, 
&c. for which the Reader is referred to the Book it felf, 
II. foh. S WA M M E R D A M, M. D. Amfterodamenfis de R E- 
S P IRA T I ONE & VS V P V L U 0 N V M. 
T PP\s Author Is of opinion, that all thofe Philofophers, who 
have hitherto inquired into the Nature and Ufa of Refpira- 
tion y have only caught the fhadow of it, nothing of the fubftance. 
And of this he gives this for the chief reafon, becaufe they have 
been too negligent in confidering the firft manifeft motion of the 
Breaft and Lungs in a Eretrn $ which particular being underftood, 
he thinks it very eafie to judge of the Refpiration of born Animals. 
He fcruples not to reprehend the immortal Doftor Harvey , for 
having excluded from the office of the Lungs the Vfe of Refrigera- 
tion ; which he pretends to have afierted himfelf by moft evi- 
dent Experiments, and uncontrolable Reafons. 
To reprefentdiffinftly, what he undertakes to makeout in this 
Traffj we may take notice of thefe particulars : 
i . He takes pains to refute the Doftrine of Attraction, and to 
fubftitute in its place the Doftrine of Pulfion or Intrufm of Air in- 
to the Lungs. 
2 . He endeavours to affert, that the Lungs do not falldom , 
but are by the Breft contracted. 
3. He affirms, to have clearly ihew’d, what is theproper fun- 
ction and work of the Biaphragme , and other Mufcles ferving for 
Refpiration, 
' 4. He pretends, to have experimentally evinced the Genuine 
Ufe of Refpiration , and the Benefit thence refulting to the Ani- 
mal Life. 
