Chapter XI: The Cell-Theory--Schleiden. Schwann. Schultze, 237

Unifying power of the cell-theory, 237. Vague foreshadowings, 237.
The first pictures of cells from Robert Hooke's Micrographia, 238.
Cells as depicted by Malpighi, Grew, and Leeuwenhoek, 239, 240.
Wolff on cellular structure, 240, 241. Oken, 241. The announcement
of the cell-theory in 1838-39, 242. Schleiden and
Schwann co-founders, 243. Schleiden's work, 243. His acquaintance
with Schwann, 243. Schwann's personal appearance,
244. Influenced by Johannes Müller, 245. The cell-theory his
most important work, 246. Schleiden, his temperament and disposition,
247. Schleiden's contribution to the cell-theory, 247.
Errors in his observations and conclusions, 248. Schwann's
treatise, 248. Purpose of his researches, 249. Quotations from
his microscopical researches, 249. Schwann's part in establishing
the cell-theory more important than that of Schleiden, 250.
Modification of the cell-theory, 250. Necessity of modifications,
250. The discovery of protoplasm, and its effect on the cell-theory,
250. The cell-theory becomes harmonized with the protoplasm
doctrine of Max Schultze, 251. Further modifications of
the cell-theory, 252. Origin of cells in tissues, 252. Structure of
the nucleus, 253. Chromosomes, 254. Centrosome, 256. The
principles of heredity as related to cellular studies, 257. Verworn's
definition, 258. Vast importance of the cell-theory in
advancing biology, 258.