TheS'^f^'z/^/^^^fliewsthellnfitners, Obfcurity and Defe- 
Givenefsof almoflall Vh^j^iologvcdX Hyfothefes hitherto re- 
ceived, and recommends fuch, as are clearly and diftinft y 
underftood 3 and agree with the Principles of Human know- 
ledge and with Obfervations and Experiments. Compare 
with this Difcourfe chat of the Noble Mr. Boyle coiKerning 
the Excellency and Grounds of the Mechanical Philofopby, 
Utely made publick. 
The Eighth reprefents the tyranny of Cufiom^ efpecially if 
it obtains from our Infancy 3 which is of that power that it 
makethmen too ofien conclude, that wliat isnot Cuftom,is 
not Reafon: AUedging wiihal the variety and firangenefs 
of the Cuftomsof feveral Nations and Countrys; and laft- 
ly fhewing, that as Cuftom doth pafs into Nature , fo Na- 
ture may be changed again by Cuftom 
The Ninth dec1ares,How much I^atuye may be improv'd 
and advanced by Art, Culture, Care and good Education 5 
and how much impaired and degraded by the wane there- 
of 5 As alfo, what an excellent Prerogative it is, to have O- 
riginally a good Nature, it being far more eafy to breed and 
guard vertues in fuch that are endovv'd with it , than where 
either Nature or Cuftom of Evil muft\ be firft ex- 
pelled. 
Ixith^Tenth, the Author exhorts to the ftudy and culti- 
vating of his Mother tongue, which is the Vanifh , fo as to 
couch and publifli therein whatever is curious and ufeful^ 
whereby to polifh, inftruft and benefit all forts and condi- 
tions of Men in the whole nation , and fo to take them off 
from idlenefs, and free them from poverty, by giving them 
the occafion'and advantage of reading, and entertaining 
themfelves in, their own tongue with what is both diverci- 
fing and advantageous in all kind of knowledg, recreations, 
praSifes, trades and occupations* 
Y In 
