Microscopic view of an oyster shell Size:XXL: 127 x 100cm The boy is lent against

The boy is lent against a desk with books on

29 April 1802

X-ray image of Lord Balfour's left hand showing its bones and a faint outline of the soft tissue of his fingers

crossing the line dividing Indian territory from Inuit

Microscopic view of an oyster shell Size:XXL: 127 x 100cm The boy is lent againstIllustrations accompanying a letter describing Antoni van Leeuwenhoek's microscopical observations, dated March 1682. An English extract was printed in Philosophical Collections ed. Robert Hooke (London, 1682) no. 5, pp. 152 160. The illustrations show an oyster shell (fig. 6), and Leeuwenhoek's hypothesis about the formation of oyster shells (fig. 7). Original: red chalk on paper. 1682