242 



Wetli, Prof. 192 Wiedemann, 136 



Whewell, W. D.D. 4, 74, 81, 84, 89, Willis, Prof. 148 



99, 100, 103, 110, 148, 149, 158, 176, 



203, 204, 217, 226 Young, Prof. 36 



SUBJECTS. 



Aberration of light, 19 



Absolute thermometric scale, 66 



Adjustments of a transit, 123 



Algebra, foundation of, III. 1 

 IV. 13 



Algebraic Equations, Geom. repre- 

 sentation of their roots, 28 



Analysis, continuity in, 36 



Angle, infinite, 14 



Antithesis of Philosophy, fundamen- 

 tal, 4, 74 



Arbitrary constants, discontinuity of, 

 181 



Arctic Eegions, geological discoveries 

 in, 219 



Argument, origin and meaning of the 

 word, 217 



Aristotle's account of induction, 89 



Astronomical instruments, construc- 

 tion of, 206 



Athenian trireme, structure of, 175 



Atwood's machine, 148 



Aurora Borealis, 20 



Avalanche in 1752, 236 



Axis of a zone, direction of, 203 



Balance, knife edges of, 119 



Banking, theory of, 227 



Barrow, and his academical times, 



203, 204 

 Biela's double comet, 120 

 Body and Space, knowledge of, 97 

 Bones, growth of, 226 

 Bows, motion of, 223 



Calorimeter, a new, 217 



Camera lucida prisms, 218 



Capillary action, theories of, tested, 



182 

 Carboniferous period, fossil fish of, 



64 

 Caustic, intensity of light near, 62 

 Chemical compounds, 230 

 Clock escapements, 77, 121 

 Clouds, height of, 119 

 Coinage of England, 234 

 Colours, experiments on, 149 

 ,, of thick plates, 110 

 Combinations, &e. of numbers, 43 

 Comet, Biela's, 120 

 ,, Donati's, 204 

 Klinkerfue's, 132 



Composition of forces, principles of, 



208 

 Conductivity of substances, 181 

 Consonances, imperfect, 190 

 Continuity, principle of, 36 

 Crystals of an anorthic system, 203 



,, of the oblique system, 136 

 Crystallized minerals, 116 

 Crystallography, sphere in, 209 



„ investigation of, 234, 



239 

 Cubic cones and curves, theory of, 228 

 Curve, equation to, 81, 83, 100 

 Curves, on singular points of, 155 

 Cyclones, theory of, 127 



Dent, geology of the valley of, 236 

 Development of vertebral system, 132, 



146 

 Diffraction, dynamical theory of, 85 

 Dispersion of light, 119 

 Divergent series, &c, 6, 181 

 Dorsetshire, deep pits in, origin of, 

 194 

 ,, Purbeck strata of, 147 



Earth, interior temperature of, 126, 

 see 181 

 ,, superficial do. 116 



,, changes in do. 148 



Earth and other planets, external 



temperature of, 149 

 Earthquake in Switzerland, 158 

 Eclipse of the Sun, Mar. 15, 1858, 203 

 July 18, 1860, 226 

 Elastic beams, impact on, 88 



,, medium, equation for motion 



of, 56 

 ,, rods, motion of, 223 

 ,, solids, friction of, 16 

 Electricity, origin of, 227 

 Elliptic analyzer, an, 111 

 Entozoa, discoveries respecting, 148 

 Equality, sign of, 229 

 Equation, algebraic, proof of root of, 

 194, 205, 209, 218 

 ,, relating to bridges, 83 

 to a curve, 81, 83, 100 

 ,, differential, of the first 



order, 101 

 ,, ,, solution of, 172 



,, ,, theory of, 136 



