According to the undulatory theory, light is thus refracted.
This undulatory movement, as it is called, pushes the fish's body ahead.
As the holes are close to the walls of the basket, the cream has not the undulatory motion of the milk, which would injure it.
An earthquake is a vertical vibration, having an undulatory progression.
If these theories be true, we may hereafter ignore all undulatory processes.
(uttered in his undulatory accents, and with an appraising, pondering gaze at her).
An idea of the cause of this change may be obtained by reference to the undulatory theory of light.
Because the undulatory motion of their muscles serves them for fill the purposes of progression needed by their mode of life.
What pitch is to the ear in acoustics, colour is to the eye in the undulatory theory of light.
Now, it seems to us that there is quite as much of hypothesis in this speculation of Laplace as in the undulatory theory of light.