TY - JOUR T1 - An Abstract of a Letter from Mr. Anthony Leeuwenhoeck of Delft about Generation by an Animalcule of the Male Seed. Animals in the Seed of a Frog. Some Other Observables in the Parts of a Frog. Digestion, and the Motion of the Blood in a Feavor JF - Philosophical Transactions (1683-1775) VL - 13 SP - 347 EP - 355 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1683.0049 M3 - doi:10.1098/rstl.1683.0049 AU - Leeuwenhoeck, A. ER -