Arithmetic. *3915.17=**E.5118.,16 Schooten, F. v. -1661. Francisci & Schooten... (Continued) plana restituta.-De organica conicarum sectionum in plano descriptione tractatus.-Sectiones triginta miscellanedeé, The half-title reads, Francisci & Schooten Exer - citationvm mathematicarvm libri quinque,.