`I never went to him,' the Mock Turtle said with a sigh:  `he
taught Laughing and Grief, they used to say.'

  `So he did, so he did,' said the Gryphon, sighing in his turn;
and both creatures hid their faces in their paws.

  `And how many hours a day did you do lessons?' said Alice, in a
hurry to change the subject.

  `Ten hours the first day,' said the Mock Turtle: `nine the
next, and so on.'

  `I never went to him,' the Mock Turtle said with a sigh:  `he
taught Laughing and Grief, they used to say.'

  `So he did, so he did,' said the Gryphon, sighing in his turn;
and both creatures hid their faces in their paws.

  `And how many hours a day did you do lessons?' said Alice, in a
hurry to change the subject.

  `Ten hours the first day,' said the Mock Turtle: `nine the
next, and so on.'

though their Causes be not yet discover'd. For these are manifest Qualities, and their Causes only are occult. And the _Aristotelians_ gave the Name of occult Qualities, not to manifest Qualities, but to such Qualities only as they supposed to lie hid in Bodies, and to be the unknown Causes of manifest Effects: Such as would be the Causes of Gravity, and of magnetick and electrick Attractions, and of Fermentations, if we should suppose that these Forces or Actions arose from Qualities unknown to...