Table of Contents

Preface; 1. On the description of oval curves and those having a plurality of foci; 2. On the theory of rolling curves; 3. On the equilibrium of elastic solids; 4. On the transformation of surfaces by bending; 5. On a particular case of the descent of a heavy body in a resisting medium; 6. On the theory of colours in relation to colour-blindness; 7. Experiments on colour as perceived by the eye, with remarks on colour-blindness; 8. On Faraday's lines of force; 9. Description of a new form of the Platometer, an instrument for measuring the areas of plane figures drawn on paper; 10. On the elementary theory of optical instruments; 11. On a method of drawing the theoretical forms of Faraday's lines of force without calculation; 12. On the unequal sensibility of the Foramen Centrale to light of different colours; 13. On the theory of compound colours with reference to mixtures of blue and yellow light; 14. On an instrument to illustrate Poinsont's theory of rotation; 15. On a dynamical top, for exhibiting the phenomena of the motions of a body of invariable form about a fixed point, with some suggestions as to the earth's motion; 16. Account of experiments on the perception of colour; 17. On the general laws of optical instruments; 18. On theories of the constitution of Saturn's rings; 19. On the stability of the motion of Saturn's rings; 20. Illustrations of the dynamical theory of gases; 21. On the theory of compound colours and the relations of the colours of the spectrum; 22. On the theory of three primary colours; 23. On the physical lines of force; 24. On reciprocal figures and diagrams of forces; 25. A dynamical theory of the electromagnetic field; 26. On the calculation of the equilibrium and stiffness of frames.