The first step in the development of method in historical linguistics was the seeking out of uniform phonetic correspondences; we take these correspondences to be the results of a factor of change which we call 'phonetic change'.
- Bloomfield (1935), Pag. 347

Historically, we picture phonetic change as a gradual favoring of some non-distinctive variants and a disfavoring of others.
- Bloomfield (1935), Pag. 365

Phonetic change, as defined in the last chapter, is a change in the habits of performing sound-producing movements.
- Bloomfield (1935), Pag. 369

Phonetic change acquires significance only if it results in a change of phonemic pattern.
- Bloomfield (1935), Pag. 369