Projective Geometry 139
Ptolemy 137, 173
Pythagoras 18
Quantity|EtSeq 245
Rate of Increase of Functions|EtSeq 220
Ratio|EtSeq 72
Real Numbers|EtSeq 73
Rectangle 57
Relations between Variables|EtSeq 18
Resonance 170, 171
Rosebery, Lord 194
Scale of a Map 178
Seidel 210
Series|EtSeq 74, 194
Shelley (quotation from) 217
Similarity@Similarity|EtSeq 177
Similarity 237
Sine|EtSeq 182
Specific Gravity 41
Squaring the Circle 187
Standard of Approximation|EtSeq 159, 201, 229
Steps@Steps|EtSeq 79
Steps 96
Stifel 85
Stokes, Sir George 210
Sum to Infinity|EtSeq 201