"The cause of this, however, is, that the idea of individual, in the sense in which it occurs in animal nature, cannot…"

"But every plant developed in any higher degree, is an aggregate of fully individualized, independent, separate beings…"

"Each cell leads a double life: an independent one, pertaining to its own development alone; and another incidental, i…"

"How does this peculiar little organism, the cell, originate?"

"To enter upon Raspail’s work appears to me incompatible with the dignity of science. (in relation to François Raspail)"

"It is an altogether absolute law, that every cell (setting aside the cambium for the present) must make its first app…"

"The universal and altogether absolute fact at which we first arrive is, that the fibres are never formed free, but ar…"

"I now return, after this somewhat lengthy digression, to my subject."

"Words have no value in themselves, but are like coin, merely tokens of a value not exhibited in species, in order to …"

"Unfortunately the perplexity of our social relations has caused us to forget entirely the original meaning of money, …"