412 



MEMOIR OF AUGUSTUS DE MORGAN. 



Oblate 

 Oblique 

 Obliquity 

 Oblong 

 Observation and 



experiment 

 Occultation 

 Octans 

 Offsets 

 Operation 

 Orb, Orbit 

 Order 

 Ordinate 



Precession and nuta- Reduction 



Regular figures, 

 polygon, solids, 

 polyhedrons 

 Relation (mathl.) 

 Residual phenomena 



tion 



Pressure 



Prime 



Primum mobile 



Principia 



Probability, theory of Resistance ? 



Problem Reversion 



Process ? 



Progression 



Projection 



Projection of mathe- 

 matical diagrams 



Oscillation and centre Proportion 

 of oscillation Proportional 



Pace 



Parabola 



Paradox 



Parallelepiped 



Parallelogram 



Parallels 



Parameter 



Penumbra 



loga- 

 rithms 



Proportional parts 

 Ptolemaic system 

 Pyramid 



Quadrant 

 Quadrature 

 Quadrature of the 

 circle 



Percussion, centre of Quantity 



Perimeter Quarter 



Periodic functions Quartile 



Periods of revolution Quintal 



Piccolomini, A. Quintile 



Piling of shot 



Pipe 



Planet 



Planisphere 



Point of contrary 

 flexure 



Pole, Polar 



Polygon and poly- 

 hedron 



Pond, John 



Power (mechanics) 



Practice 



Radix 

 Ratio 

 Ratios, composition 



of 

 Ratios, prime and 



ultimate 

 Reciprocal 

 Rectangle 

 Rectification 

 Recurring scries 



Reversion of series 

 Revolution 

 Rhomb, Rhombus, 



Rhomboid 

 Rhumb, or Rumb 

 Right angle 

 Root 

 Rotation 

 Round 

 Rule, Ruler 



Sagittarius 



Salient 



Saros, Neros, Sosos 



Satellite 



Scale, musical 



mathematics 

 Scholium 

 Scruple 



Seasons, change of 

 Segment 

 Series 



Sexagesimal 

 Sextans (constell.) 

 Side 

 Sidereal 



Sign, astronomy 

 Sign, mathematics 

 Similar, similar 



figures 



Sine and Cosine 

 Sine and Cosine, 



curves of 



