Newton@Newton|EtSeq 218
Non-Uniform Convergence|EtSeq 208
Normal Error, Curve of 214
Oersted@Öersted 34
Order|EtSeq 194
Order, Type of@Order, Type of|EtSeq 75
Order, Type of 196
Ordered Couples|EtSeq 93
Ordinate 95
Origin 95, 126
Pappus 135, 136
Parabola|EtSeq 131
Parallelogram Law@Parallelogram Law|EtSeq 51
Parallelogram Law 99, 126
Parameters 69, 117
Pencils 140
Period 170
Period@Period|EtSeq 189
Periodicity@Periodicity|EtSeq 164
Periodicity 188, 216
Pitt, William 194
Pizarro 122
Plutarch 37
Positive and Negative Numbers|EtSeq 83
Projective Geometry 139
Ptolemy 137, 173