A. Because it produces _prussic acid_, which destroys their _nervous system_. Q. _Why is strong GREEN TEA UNWHOLESOME?_ A. Because it contains _prussic acid_, which destroys the _nervous system_. Q. _Why is a DEAD man TALLER than a living man?_ A. Because at death the CARTILAGES are _relaxed_. So, also, after a night's rest, a man is _taller_ than when he went to bed. Q. _What is SLEEP?_ A. Sleep is the _rest of the brain_ and _nervous system_. Q. _Why can we not SEE, when we are asleep with our EYES OPEN?_ A. Because the "RET´INA of the eye" is _inactive_ and at rest. Q. _Why can we not HEAR in sleep?_ A. Because the drum or "TYMPANUM of the ear" is placid and at rest. Q. _Why can we not TASTE when we are asleep?_ A. Because the nerves _at the end of the tongue_ (called papillæ) are inactive and at rest. Q. _Why can we not FEEL when we are asleep?_ A. Because the _ends of the nerves_ (called papillæ), situated in the skin, are inactive and at rest. Q. _Why have persons in sleep no WILL of their own, but may be moved at the will of ANY one?_ A. Because the "CEREBELLUM" (or _posterior_ part of the brain) is inactive and at rest. Q. _Why have DREAMERS no power of JUDGMENT or REASON?_ A. Because the "CEREBRUM" (or _front_ of the brain) is inactive and at rest. Q. _Why are DREAMS such FOOLISH and INCONSISTENT things?_ A. Because the "PINEAL GLAND" is acting _without the brain_; and the _faculty of thinking_ exists in the "PINEAL GLAND," but the _faculty of judgment_ in the "CEREBRUM of the brain." The cerebrum of the brain occupies the top and front of the skull. The PINEAL GLAND is a small conical gland (about the size of a pea) _in the brain_. Q. _Why do some persons LOSE all POWER of SENSATION?_ A. Because the "CEREBRUM" (or _front_ of their brain) _has been injured_. Q. _Why are many persons IDIOTS?_ A. Because the "CEREBELLUM of the brain" _has been removed_ by some accident, or _injured by some disease_. The cerebellum is all the posterior part of the brain. Q. _Why does a person FEEL when he is TOUCHED?_ A. The ends of certain nerves (called PAPILLÆ) situated in the skin _erect themselves_ when touched, and produce a nervous sensation called FEELING. Q. _Why are persons able to TASTE DIFFERENT FLAVOURS?_ A. Because the "PAPILLÆ" of the tongue and palate _erect themselves_ when food touches them, and produce a nervous sensation called TASTE. Q. _Why do very OLD people LOSE the power of VOLITION, SENSATION, and THOUGHT?_ A. Because their _brain ossifies_; and as the "_cerebrum_" (or _front_ of the brain) goes, they lose the power of _sensation and reason_; and as the "_cerebellum_" (or _posterior_ part of the brain) goes, they lose the power of _volition_. Q. _Why are OLD people UNABLE to WALK?_ A. Because their _muscles become rigid_. GLOSSARY.