($) 
havinff thereupon declared the Rcafons^ 
why later Authors haye receded frQii^ 
the Opinion of the Antients, and why 
hitherto the Contrpverfie hath not been 
fully decided, though many things be - 
found very we|l written upon by divers, 
y,et at length returning to You, Mofi Se- 
rem Prince ^ after many other things 
partly found a new,partly freed from old 
doubts;by your Patronage and encou¬ 
ragement, / fliow that we oyve alfo to 
You the hope we have, that this uiatier 
alio wiU fliortly he brought to an ilfue. 
In the Secondp3xt is rcfolved the Ge- 
mrd Trobleme^ whence depends the Ex¬ 
plication of every difficulty in this Point* 
which is, A Body of a, certain Figurctand 
naturally froduced, being given, to pnde 
m the Body it fetf Arguments, difcevering 
the Flace and Manner of its Produ^ion. 
Here> before / proceed to make out this 
Probleme, I endeavour to explain all the 
words thereof in that fenfe, which no 
5ed of Philofophers (hall find any thing 
ih to except againft it. 
Ih^Third Part 1 have defignedfor th|: 
Examination of the particular Solids in-* 
• *' ' ' ■ ' eluded 
v- ‘ - r 
