"And now," said my friend, "that is what we call a 'tropism,' and all life is a tropism.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
Life is a tropism, caused by the presence of certain combinations of chemicals; my friend knows this, because he has produced the thing in his test-tubes.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
In all experiments on this subject we should take into account the possible influence of osmotic pressure, since many of the causes of tactism or tropism also modify the osmotic pressure at the point of action, and it is possible that this modification is the true cause of the phenomenon.
"The Mechanism of Life"
Stéphane Leduc