Published Arcana Naturae Microscopiorum (Nature's Mcroscopical Mysteries), 19 Letters from 28 - 52 (2nd)
Date:
January 1, 1696
In 1696, Leeuwenhoek re-titled the volume Anatomia Seu Interiora Rerum and re-published as a second edition (editio altera) it under the title Arcana naturae, ope & beneficio exquisitissimorum microscopiorum, detecta.
It was sometimes bundled with Continuatio Epistolarum, Letters 52-60.
Dobell confused this title with the similarly titled Arcana naturae detecta.