I was then in Germany, attracted thither by the wars in that country, which have not yet been brought to a termination; and as I was returning to the army from the coronation of the Emperor, the setting in of winter arrested me in a locality where, as I found no society to interest me, and was besides fortunately undisturbed by any cares or passions, I remained the whole day in seclusion[^1], with full opportunity to occupy my attention with my own thoughts.
Also, the brain is contained in a tight membrane called the dura which is, in turn, cushioned by a thin layer of fluid located between it and the skull.
The resulting vibration is received and transmitted into the brain itself via the fluid filled third and left ventricles located above the brain stem.