be
relieved by exciting a free action in the vessels of the skin.

2d. It is no uncommon occurrence that diseased or irritated conditions
of the mucous membrane of the stomach or intestines produce diseases
or irritations of the skin, as is seen in the rashes attendant on
dyspepsia, and eating certain species of fish. These eruptions of the
skin can be relieved by removing the diseased condition of the
stomach.

35. The FIBROUS TISSUE consists of longitudinal, parallel fibres,
which are closely united. These fibres, in some situations, form a
thin, dense, strong membrane, like that which lines the internal
surface of the skull, or invests the external surface of the bones.
In other instances, they form strong, inelastic bands, called
_lig'a-ments_, which bind one bone to another. This tissue also
forms _ten'dons_, (white cords,) by which the muscles are attached
to the bones.

_Observation._ In the disease called rheumatism, the fibrous tissue is
the part principally affected; hence the joints, where this tissue is
most abundant, suffer most from this affection.

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34. Describe the dermoid tissue. What is said of the sympathy between
the functions of the skin and mucous membrane? Give another instance
of the sympathy between these membranes. 35. Of what does the fibrous
tissue consist? How do these appear in some situations? How in others?
What tissue is generally affected in rheumatism?

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36. The ADIPOSE TISSUE is so arranged as to form distinct bags, or
cells. These contain a substance called _fat_. This tissue is
principally found beneath the skin, abdominal muscles, and around the
heart and kidneys; while none is found in the brain, eye, ear, nose,
and several other organs.

_Observation._ In those individuals who are corpulent, there is in
many instances, a great deposit of this substance. This tissue
accumulates more readily than others when a person becomes gross, and
is earliest removed when the system emaciates, in acute or chronic
diseases. Some of the masses become, in some instances, enlarged.
These enlargements are called _adipose_, or _fatty tumors_.

[Illustration: Fig. 4. 1, A portion of the adipose tissue. 2, 2, 2,
Minute bags containing fat. 3, A cluster of these bags, separated and
suspended.]

37. The CARTILAGINOUS TISSUE is firm, smooth, and highly elastic.
Except bone, it is the hardest part of the animal frame. It tips the
ends o