Periscopic camera obscura William Gould The figures on the street

The figures on the street include a street seller

The interior of the Pantheon

The 'troops' headed by Major Topham

Southport in Merseyside

Two horses can be seen on the towpath

Periscopic camera obscura William Gould The figures on the streetPlate 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