244 



Nervous system, 177 



Newton's Principia, Hegel on, 84 



,, rings, central spot of, 78 

 Notation, new, for Geometry, &c. 33 

 Numbers, partitions of, 43 



Occultation of Jupiter, 179 

 „ Saturn, 216 



Optical instruments, theory of, 173 

 Ordnance, strains and vibrations of, 228 

 Organic forms, succession of, 123 

 Oscillations of suspension bridges, 115 

 Oscillatory waves, theory of, 37 



Palaeozoic rocks, 158 

 Partitions of numbers, 43 

 Pendulums, effect of friction of fluids 



on, 104 

 Periodic series, 61 

 Permutations, &c. 43 

 Philosophy, fundamental antithesis of, 



4, 74 

 Photography, applications of, 117, 145, 



182 

 Physiological alphabet, 182 

 Planimeters, various, 192 

 Plato, cosmical system of, 207 



,, mathematical part of the Meno 

 of, 217 



,, Sophista of, 191 



„ Timseus of, 226 



,, notion of dialectic, 149 



,, ,, of the intellectual 



powers, 158 



,, survey of the sciences, 148 



„ theory of ideas, 176 

 Polarity, organic, 200 

 Polarized light, streams of, 115, 117 

 Political economy, 99, 103, 226 

 Potash, reflective properties of, 132 

 Potato disease, analysis of, 21 

 Prisms, for surveying, 218 

 Probabilities, theory of, 29, 90, 147, 227 

 Pronunciation of Greek, 223 

 Pterodactyles, 228, 230 



„ osteology, &o. of, 228 



Purbeck strata, 147 



Quicksilver, how to make tremorless, 

 122 



Eailway bridges, 83 



Eainbows, instrument for measuring, 



226 

 Eefraction, double, 73, 120, 235 

 Eock masses, internal pressure on, 53 

 Eocks, Palaeozoic, 158 



,, succession of, 228 

 Eoots of equations, rational, 79 



Saturn, occultation of, 216 

 Saurornia, 230 



Sciences, hypotheses in, 110 



,, of magnitude and direction, 



19 

 „ of mechanics and geometry, 

 15 

 Series, divergent, &c. 6 



,, infinite, 95 



,, Maclaurin's, 145 



„ neutral, 228 



,, periodic, 61 



„ self-repeating, 145, 173 

 Signs + and - , history of, 232 

 Skull, vertebral theory of, 230 

 Solar eclipse, 203, 226 

 Solitary waves, math, theory of, 25 

 Sound, theory of, 75 

 Space, knowledge of, 97 

 Species, nearly allied, 127 



,, theories on new, 223 

 Spitzbergen, notes od, 232 

 Squares, Least, on, 5 

 St John's College Observatory, long. 



and lat. of, 119 

 Standard of weight, 177 

 Statue of Solon, 199 

 Storm tracks of the South Pacific, 127 

 Strata, Purbeck, 147 

 Sun, autographs of, 230 

 Surfaces, transformation of, 134 

 Surveying instruments, 206 

 Suspension bridges, oscillations of, 



115 

 Syllogism, 29, 90, 121, 194, 222 

 Symbolical system of geometry, &c. 38 



Thallium, a new metal, 227 

 Theory of probabilities, 29 

 Therrnometric scale, absolute, 66 

 Transit instrument, adjustments of, 



123 

 Transport of erratic blocks, 9 

 Trebbia, battle of, 204 

 Trigonometry, plane, and its formulae, 



74 

 Trireme, Athenian, 175 



Undulatory theory, 26, 27, 73 



Velocities, &c. direct method of esti- 

 mating, 166 



Vertebral system, researches on, 132, 

 146 



Vertebrate animals, limbs of, 206 

 ,, skeleton, 177 



Vibratory motion of a medium, 56, 73 



Vitality, on, 228 



Voluntary muscles, defects in, 200 



Waves, solitary, theory of, 25 

 Whale from the oolite, fossil, 228 

 Wood engraving, photography applied 

 to, 182 



&#. 



