f the
cutaneous vessels is not inordinately increased, as this would
debilitate, not only the skin, but the internal organs of the system,
as the stomach and lungs.

671. No rule as to the quantity of clothing can be given, as the
demand will vary with different individuals. The following are among
the most prominent causes of this variation: Those persons who have
large, active brains, full chests, well developed lungs, breathe an
adequate amount of pure air, and take sufficient food to supply the
wants of the system, require less clothing than those of an opposite
character, because more heat is generated in the system.

672. _The child and the aged person require more clothing than the
vigorous adult._ "Should we judge from observation, the inference
would be, that children require less clothing than adults. This is an
error, for the temperature in infancy is not only lower than in
manhood, but the power of creating heat is feebler. The same remarks
are applicable to those persons who have outlived the energies of
adult life."

_Observation._ The system of "hardening" children, by an inadequate
supply of clothing, and keeping them uncomfortably cold throughout the
whole day, is inhuman, as well as unprofitable. It operates upon the
child somewhat like the long-continued chill upon a certain portion of
the farmer's herd, that are kept shivering under the thatched shed,
retarding the growth of their systems, which require more food to
satisfy the keen cravings of hunger than when they are comfortably
sheltered. To make the boy robust and active, he must have nutritious
food at stated hours, and free exercise in the open air, and his
system must be guarded from chills by a due amount of apparel.

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670. What should be the invariable rule in reference to the amount of
clothing that should be worn? What precaution should be observed? 671.
What are some of the causes of the variation of the demand for
clothing? 672. Why do the child and aged person require more clothing
than the vigorous adult? What is said of the system of hardening
children?

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673. _More clothing is needed when a vital organ is diseased._ It may
be observed that in consumption, dyspepsia, and even in headache, the
skin is pale and the extremities cold, because less heat is generated.
Thus persons affected with these complaints, when exposed to cold air,
need more clothing than those individua