Indeed Turpin, and subsequently Berkeley and Hoffmann, believed that they had traced the development of the Torula into the well-known and very common

In his famous "Mikroskopische Untersuchungen" Schwann speaks of Torula as a "cell"; and, in a remarkable note to the passage in which he refers to the yeast plant, Schwann says: "I have been unable to avoid mentioning fermentation, because it is the most fully and exactly known operation of cells, and represents, in the simplest fashion, the process which is repeated by every cell of the living body.