-=-=-=-=-=-=-=-=-=-=-=-=

2d. To remove these painful excrescences, take a thick piece of soft
leather, somewhat larger than the corn; in the centre punch a hole of
the size of the summit of the corn, spread the leather with adhesive
plaster, and apply it around the corn. The hole in the leather may be
filled with a paste made of soda and soap, on going to bed. In the
morning, remove it, and wash with warm water. Repeat this for several
successive nights, and the corn will be removed. The only precaution
is, not to repeat the application so as to cause pain.

643. Let a person unaccustomed to manual labor, trundle the hand-cart,
or row a boat, for several successive hours, and the cuticle upon the
palms of the hands, instead of becoming thicker by use, is frequently
separated from the subjacent tissues, by an effusion of serum,
(water,) thrown out by the vessels of the true skin. Had the friction
been moderate, and applied at regular intervals, instead of blisters
being formed upon the inside of the hands, material would have been
thrown out to form new layers upon the lower surface of the cuticle.

644. The cuticle is interesting to us in another point of view,
as being the seat of the color of the skin. The difference of
color between the blonde and the brunette, the European and the
African, lies in the cuticle;--in the deeper, and softer, and
newly-formed layers of that structure. In the whitest skin, the
cells of the cuticle always contain more or less of a peculiar
pigment, incorporated with the elementary granules which enter
into their composition. In the white races, the pigmentary tint
is extremely slight, and less in winter than in the summer season.
In the darker races, on the contrary, it is deep and strongly
marked.

-=-=-=-=-=-=-=-=-=-=-=-=

How can they be removed? What precaution is given? 643. Explain why
those persons unaccustomed to labor, blister their hands in rowing a
boat or performing ordinary manual employment for several successive
hours. 644. In what other point of view is the cuticle interesting? In
what part of it do we find the coloring matter?

-=-=-=-=-=-=-=-=-=-=-=-=

645. The various tints of color exhibited by mankind, are, therefore,
referable to the amount of coloring principle contained within the
elementary granules of the cuticle, and their consequent depth of hue.
In the negro, the granules are more or less black; in the European of
the south, they are amber-col