Twigs which have been bent get suddenly released in the natural course of events; they do not move slowly.

The instantaneous appearance of a twig where no twig was before may possibly give the victim pause; it may halt out of caution, not out of terror .-- [TRANS.]] [Footnote 3: The word "butterfly" is here used, as is the French _papillon_, as a general term for all Lepidoptera; the insect in question is of course a moth.] [Footnote 4: Now classified as _Lasiocampa quercus_ .-- [TRANS.]] [Footnote 5: _Rabasso_ is the Provencal name for the truffle; hence a truffle-hunter is known as a _rabassier_.] [Footnote 6: Since these lines were written I have found it consuming one of the true tuberaceae, the _Tuber Requienii_, Tul., of the size of a cherry.] [Footnote 7: The difficulty in conceiving this theory lies in the fact that the waves travel in straight lines.

On the other hand, matter in a state of degradation may expel particles highly energised and of enormous velocity.

Most antennae are covered with hairs of inconceivable fineness; others may contain cavities of almost infinite minuteness.

Is it not thinkable that they are able to detect, in the gaseous atmosphere, floating particles that are not gaseous?
This would not prevent the specialisation of antennae as mere feelers in some insects and crustaceans.