Note 178 — Chapter XVI · THE STEPS IN THE DEVELOPMENT OF LAMARCK’S VIEWS ON EVOLUTION BEFORE THE PUBLICATION OF HIS PHILOSOPHIE ZOOLOGIQUE

“We know that all the forms of organs compared to the uses of these same organs are always perfectly adapted. But there is a common error in this connection, since it is thought that the forms of organs have caused their functions (en ont amené l’emploi), whereas it is easy to demonstrate by observation that it is the uses (usages) which have given origin to the forms of organs.”