'Black drop' effect during the 1769 Transit of Venus Size:L: 90 x 60cm Plate 21 figures 7-9 from

Plate 21 figures 7-9 from the paper 'Farther observations on the feet of animals whose progressive motion can be carried on against gravity'

' Sir John Bowring was elected a Fellow of the Royal Society in 1856

it rather optimistically considers

on its opening night in 1821 (1823)

'Black drop' effect during the 1769 Transit of Venus Size:L: 90 x 60cm Plate 21 figures 7-9 fromSketch showing the planet Venus at ingress on its passage across the face of the Sun. Detail from a letter by Samuel Horsley, giving an account of the Transit of Venus observed at Oxford, England, using an 18 inch reflecting telescope. The illustration appeared as plate 8 of the published paper 'Venus observed upon the Sun at Oxford, June 3, 1769', by Samuel Horsley, Philosophical Transactions of the Royal Society, vol. 59 (1769) pp. 183 188.