Ondervindingen en beschouwingen der onsigbare geschapene waarheden, waar in gehandeld werd vande eyerstok, etc / [Antoni van Leeuwenhoek].

Leyden : D. van Gaesbeeck, 1684.

1 unnumbered leaf, 21, 19 pages : engr. illustrations ; (4to)

Dobell 2

Letters 37 and 39.

Copy 1 Note: Four copies bound in his [Brieven], 1684-1713: I(4 & 6) [in this copy fig. on p. 9 of pt. 1 misprinted; II(6) [Letter 39 only]; III(6) [Letter 39 only]; IV(4) [Letter 37 only]

Copy 2 Note: Letter 37 only.