and that the overflowing of the Nile always happens at a certaia 
^ay. 
IntheL^T^, he alledges fome Relations, ferving to confirm 
his Opinion : Whieh are too long here to infift upon. 
DE PRINC IPIIS ET K At 10 € IN At ION E 
QEO METRATLV M'^ Contra Fafium Profejjbrum GedmetrifC^ 
Authore Thoma Bobber. It feems^ that this Author is angry 
with all Geometricians, buthimfelf; yea he plainly (aith iiuhe 
dedication of his Book^ that he invades the whek TSJatien of therm 
and unwilHng, it Teems, to becalFd to an accountfor doing {o^ 
He will acknowledge no judge of this Age* but is ful! of 
hopes, that pofterity will pronounce for him. Mean while he 
ventures to advance this Dilemma^ Esrum qui de iifdem rebus 
m9Cum aliquid e Aider mt^ aut folusinfanioEgo^autfQhs mriin[amoi 
tertium enim nonefl, niJI (^quoddicet forte aliquis )infania?mis om- 
ties. DoubtlefSjOne of thefe will be granted him. 
As to the Book it felf, he profeffes, that he doth not write 
it againft Geometry^ but Geometers s and that his defign in it i^, 
to uiew,That there is no lefs uncertainty and falfity in the writ- 
ings of Mathematicians, than there is in thofe of Naturalijls^ 
Moraltfls^ 6cc. though he judges^ that P^yy^^/^j'jf^^/V^^/jF^?/^?^^,^ 
if they were well demonftratcd^ would be as certain as the 
MathematicJ^. 
Attacking the Mathematical Principles as they are found in 
Books, and withall fome Demonftrationsjhe takes to task Et^clid -' 
him(elf, infteadofall, astheMafterof all Geometricians, ^nd 
with him his beft interpreter, Chvitis^ examining in the firfi 
place, the Principles Euclid : Secondly^ Declaring falfe^ what 
ss fuperftru<3:ed upon them, whether by Euclid, or CUvius, or 
any G^^o^^i^^rv/hatfoever that hath made ufe of thofe or other 
( as he is pleafed to entitle them) falfe Principles, Thirdly^ Pre* 
tendingjthat he means (o to combat all^both Principles and De- 
monftrations, undertaken by him, as that he will fubftitate^ bet- 
ter in their room^ leaft he Ihould feem to undermine the Sci- 
ence it-se!fe. 
