image EL_L4_79_Fig
Image number: RS.15819
Credit: ©The Royal Society

Observations of a foetus and the reproductive organs of a sheep


13 June 1722


John Sturt (1658-1730, British), Engraver

Object type

Archive reference number

Manuscript page number





height (page): 143mm
width (page): 190mm



Five etched images. The original drawings can be found in Letter Book 15 (LBO/15/269). The printed images are cut out from Philosophical Transactions of the Royal Society, vol. 32, no. 373 (1723). Leeuwenhoek had the images drawn for him.

Engraved by J. Sturt (signature on copper plate).

Letter from Antoni van Leeuwenhoek to the Royal Society.

Fig. 1: Foetus of sheep in its membranes
Fig. 2: the fallopian tubes
Fig. 3: ovarium, with round bodies on the outside
Fig. 4: one of those bodies, thought to be an egg
Fig. 5: one of these eggs found in the uterus of the sheep.

Object history

Figures printed in Mr. Leeuwenhoek, 'Observations upon a fœtus, and the parts of generation of a sheep', Phil. Trans. vol. 32, no. 373 (1723), pp. 151-56.

Related Fellows

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

Associated place

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