to shore, and then eject them, and eat
them at their leisure. See Sect. XVI. 11. And I am well informed of a
bitch, who having puppies in a stable at a distance from the house,
swallowed the flesh-meat, which was given her, in large pieces, and
carrying it immediately to her whelps, brought it up out of her stomach,
and laid it down before them.

3. _Eructatio voluntaria._ Voluntary eructation. Some, who have weak
digestions, and thence have frequently been induced to eruct the quantity
of air discharged from the fermenting aliment in their stomachs, have
gradually obtained a power of voluntary eructation, and have been able thus
to bring up hogsheads of air from their stomachs, whenever they pleased.
This great quantity of air is to be ascribed to the increase of the
fermentation of the aliment by drawing off the gas as soon as it is
produced. See Sect. XXIII. 4.

* * * * *

ORDO III.

_Retrograde Associate Motions._

GENUS. IV.

_Catenated with External Influences._

SPECIES.

1. _Catarrhus periodicus._ Periodical catarrh is not a very uncommon
disease; there is a great discharge of a thin saline mucous material from
the membranes of the nostrils, and probably from the maxillary and frontal
sinuses, which recur once a day at exact solar periods; unless it be
disturbed by the exhibition of opium; and resembles the periodic cough
mentioned below. See Class I. 3. 2. 1. It is probably owing to the
retrograde action of the lymphatics of the membranes affected, and produced
immediately by solar influence.

2. _Tussis periodica._ Periodic cough, called nervous cough, and tussis
serina. It seems to arise from a periodic retrograde action of the
lymphatics of the membrane, which lines the air-cells of the lungs. And the
action of coughing, which is violently for an hour or longer, is probably
excited by the stimulus of the thin fluid thus produced, as well as by the
disagreeable sensation attending membranous inactivity; and resembles
periodic catarrh not only in its situation on a mucous membrane, but in the
discharge of a thin fluid. As it is partly restrainable, it does not come
under the name of convulsion; and as it is not attended with difficult
respiration, it cannot be called asthma; it is cured by very large doses of
opium, see a case and cure in Sect. XXXVI. 3. 9. see Class IV. 2. 4. 6. and
seems immediately to be induced by solar influence.

3. _Histeria a frigore._ Hyster