Colours in layers of mica and glass mb-height 5524 Onlookers watch from boats on

Onlookers watch from boats on the Thames

'Caution to Young Ladies who ride in Crinoline on Donkeys'

Old Bailey

Queen Elizabeth I with the symbols of her power

Half length portrait of Burney holding a rolled musical score

Colours in layers of mica and glass mb-height 5524 Onlookers watch from boats onColours observed within layers of mica (figures a f) with concentric circles of sixteen colours based upon Isaac Newton's observation of colours produced at the contact of two telescope object glasses (figure g). Plate 1 from the monograph A new elucidation of colours, original prismatic, and material; showing their coincidence in three primitives, yellow, red and blue, by James Sowerby (London, Richard Taylor and Co., 1809). Inscribed 'Tab. 1' top