An introduction to projective geometry and its applications; an analytic and synthetic treatment, by Arnold Emch ...

INDEX. 265
PAGE
Parabola................................................ 99, 04, 143
campaniformis cum ovali................................ 95
pura................................................... 195
puncta................................................ 96
nodata................................................. 96
cuspidata............................................. 96
Parallel projection of conics......................................146
Pascal......................................................... I33
Pascal line..................................................... 35
Peaucellier.....................................................242
Peaucellier's inversor............................................. 246
Pencils and ranges of conics...................................... 72
Pencils of rays................................................. 15, I8
Perspective...................................................... 257
Perspective; between any two given conics........................... I5I
of a square........................................... 86
of a circle........................................... 88
Perspective pencils and ranges.................................... 29
Perspectivograph, Koenigs........................................ 258
P icard....................................................... 7
Plucker...................................................... 68
Poincare....................................................... 5
Polar and tangent............................................... I3
Polar involution; of the circle..................................... 38
of conics....................................... I02
Polar reciprocity................................................. 3I
Polars of a pencil.of conics....................................... 172
Polar systems..................................................... I23
Pole, polar of a circle............................................ 38
Poncelet.................................... 7, 36, 45, 68, 92, I49, I75
Poncelet's principle of continuity.................................. 149
Poncelet's problem.............................................. 64
Poudra.............................................. 45
Principle of duality............................................ 68
Problem; in graphic statics....................................... 219
in optics.............................................. 67
Problems of the second order..................................... I6I
Products of pencils and ranges of conics............................. i80
Products of projective pencils and ranges............................ 22
Projection; central............................................ 45, 86
orthographic...................................... 73
Projective groups of transformation................................. 11