(2054) 
U. ELEMENTA GEOMETRIC PLANJt, Authore Rg\A\o 
Francifco de Gottignies Bruxelletiji^ Soc. Jejn in Collegia Ro' 
mano Mathefeos ProfejforeyKomx 1669. in 12 ♦ 
THis Author, in a Monitnm to the Students of Geometry, 
intimatesj that he hath read Mathematicks more than 7 
yearsat Kf^ej that it hath been his cuftome to advife his 
Schoiars./r/Z to read over the Definitions, the Titles of Pro- 
pofitions, and to exercife thtmfclves in the Conftruftion of 
Problems, without being folicitousof the truth of thePropo- 
fitions or Conftruftions, until they become familiar 5 and after 
they are (bmewhat converfant with the Geometrick Aflerti- 
ons and Phrafesj then to doubt of their truth as much as they 
pleafe, and ftudy their Demonftration* The (ame, in the 
Proeme thinking it convenient to begin with Quantity , treats 
of it abftraftly , as void of fuch afFeftions and modes as are 
congruent thereto. 
j. In his firft Chapter he giveth Definitions, PoftulateSjand 
Axiomes. 
2. In the (econdj becaufe one quantity in relation to ano- 
ther is faid to have a Rdtio or Proportion^ he treats of Ratio's , 
and delivers the dodlrine of the fifth Book of Euclid-^ to 
which are annexed 7 queftions about Geometrical Proportions 
with their Solutions^ clearing up the debates, that through the 
miftakes of fome lat e Authors have rifen about Ratio's, 
3* He treats of Arigles, and of the affeftions of Angles in 
plain Right-lined Figures. And at the end of this Chapter he 
ftates the queftion. Whether an Angle be a ^antiiy (hewing, 
that CUviHi affirms all Angles to be quantities 5 Peletarins de- 
nyes the Angle of ContaS to be a quantity 5 tacqnet condemns 
both, denying any Angle to be a quantity , to w lom our Au- 
thor aflentSj and on this Hypothefis r moveth 5 Paradoxes, 
that are natural to the other aflertion. And whereas a late 
Writer alledgeth, that it may be pleaded to be the opinion of 
the Antients, he faith, that among the Learned moderns , it is 
nowrefuted, herein fiding with Gregory of St. Vincent^ Ajnf 
comh^ tacquet^ and Dr. Wallis. 
4* He treatsof Reftangles* 
5. Of 
