5918.18=**E. 5029.86 Brougham, H. lst baron Brougham and Vaux. Tracts,
mathematical and physical...(Continved) and investigations on light and colours; Inquiries analytical and experimental on light; On forces of attraction to several centres; Meteoric stones; Central forces, and law of the universe analytically investigated; Attraction of bodies; Sir Isaac Newton, Grantham address.