image EL_L2_51_Fig
Image number: RS.15778
Credit: ©The Royal Society

Structures of the tongue of an ox, and the hearts of a sheep and a duck


2 April 1694


Unknown, Artist

Object type

Archive reference number

Manuscript page number




height (page): 179mm
width (page): 424mm



Five figures attached to a printed letter from Antoni van Leeuwenhoek to the Royal Society.

Fig. 1: a small bit of ox tongue
Fig. 2: the real size of the bit of tongue from fig. 1
Fig. 3: a little flesh muscle from the heart of a sheep
Fig. 4: a very small bit of the heart of a duck
Fig. 5: another small bit of the heart of a duck.

Object history

Leeuwenhoek did not send an autograph letter with drawings to the Royal Society, but a printed copy and an engraving (see Alle de brieven van Antoni van Leeuwenhoek, ed. by a committee of Dutch scientists, 17 vols [ongoing] (Amsterdam: Swets & Zeitlinger, 1939- ), X (1979), 65).

The letter and illustrations also appeared in:
A. van Leeuwenhoek, Vierde Vervolg der Brieven (Delft: H. van Kroonevelt, 1693), pp. 674-90.
A. van Leeuwenhoek, Arcana Naturae Detecta (Delft: H. a Krooneveld, 1695), pp. 445-55.

Related Fellows

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

Associated place

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