The Royal Society read the first part of Letter L-147 about the crystalline humour of the eye

May 24, 1684

Birch, History, vol. IV, p. 297, 14 May 1684 (O.S.) in London:

Part of a letter of Mr. LEEWENHOECK, dated April 14, 1684, was read; and the other part reserved till the next meeting. It was concerning the structure of the crystalline humour of the eye, which he described as consisting of many scales lying upon one another, and the scales as made of threads lying by one another in a very curious manner, as appeared from the figures.