Periscopic camera obscura William Gould Study of the 'small monument'

Study of the 'small monument' [apparently a drinking fountain] at Vietro di Potenza

The figures on the street include a street seller

August 1967

Two horses can be seen on the towpath

Southport in Merseyside

Periscopic camera obscura William Gould Study of the 'small monument'Plate 9 from the paper 'On a periscopic camera obscura and microscope', William Hyde Wollaston, Philosophical Transactions of the Royal Society, vol. 102 (1812), pp. 370 377. Five figures sketching basic optical details of a conventional and periscopic camera obscura, periscopic prism of a camera lucida and a periscopic microscope. The work is inscribed above with publication and plate details. Not signed. Royal Society stamp verso. Watermarked 'Ivy