K/PP107/4/7/1-56

Dated 1850-1875. From Working papers and experimental observations relating to optics including polarisation, photometry, spectra and the characteristics of light, [1840-1875].

Notes on optics, notably including description of lunar halo, 1850; outline of the function of the eidotrope, a kind of projection device; brief observations on the operation of the human eye, and on binocular vision. With diagrams and equations.