CONTENTS.

Of COLOURS.

The different Colours of the Sun's Light, 313How, and why sewn by a Prism, 314

The Sines of Incidence and Refraction inevery Sort of Rays determined, 315-—321Of the Harmonic Proportion of the co-loured Spectrum, 32 r

Of Visual Music, or an Ocular Harpsichord,

ibid.

The Reason of the , Imperfection of refractingTelescopes sewn, 323—328

Of the different Reflexibility of Light, andthe Cause thereof, 3 2 9—3 3 5

The Fits of easy Reflection and Transmis-sion, • • 336 , &c t

Of the Rings of. Colour’d ‘Light, explainedfrom Sir I. Newton, 339

The Theory of the Colours c/'Natural Bodiesthence deduced, 353—365

The Mathematical Theory of the Rainbow,

Z67, &c,

fts various Phænomena accounted, for,

376—384

LECTURE