image EL_L3_84_Fig
Image number: RS.15809
Credit: ©The Royal Society

Details of pumice, a shell, coral and a sponge


29 December 1705


Unknown, Artist

Object type

Archive reference number

Manuscript page number




height (page): 223mm
width (page): 178mm



Six figures in a letter by Antoni van Leeuwenhoek to the Royal Society.

The letter has suffered from water damage, which has caused this page with images to leave marks on p. 2 when it was at some point kept within the letter.

Fig. 1: a small part of a pumice stone, in which one can see some very tiny hollow pipes, which one cannot usually see.
Fig. 2: a detail of a pumice stone in which the pipes are not straight.
Fig. 3: another rare alignment of canals in a pumice stone.
Fig. 4: a little shell.
Fig. 5: a part of a sea shell, called sea horn, on which some small coral parts had got stuck.
Fig. 6: a small part of a sponge.

Object history

The Journal Book mentions on 27 Feburary 1705/6, 'A Letter was read from Mr Lewenhoeck concerning pumice stones, & spunges. He was ordered to be thanked' (JBO/11/83).

A. Leeuwenhoek, ‘Several Microscopical Observations on the Pumice-Stone, Coral, Spunges, etc.’, Phil. Trans. vol. 24, no. 304 (November and December 1705), pp. 2158-63, tab. 1, figs 1-6.

Related Fellows

Antoni van Leeuwenhoek (1632-1723, Dutch), Naturalist

Associated place

<The World>
   > Europe
      > Netherlands