Terrestrial refraction Finish:Float frame View of Royal Exchange and

View of Royal Exchange and the Bank of England on left

with Dr Hales' machine for the ventilation of prison apartments above the battlements

with school children playing

View of buildings in Fetter Lane with figures and a horse-drawn cart in the street

Terrestrial refraction Finish:Float frame View of Royal Exchange andPlate illustrating John Ross's report of the curious effects of refraction in Arctic latitudes. The observations were made on 22 September 1832 at North End Cape, Somerset Island, in the Canadian Arctic. Figure 1 shows the land 'as with no refraction, distant fourteen miles'; figure 2 shows 'the same land, with an iceberg four miles distant raised above the land'; figure 3 shows 'the same refracted in a different way on the same day.' Plate facing p.