How do you know that the outer skin has no blood-vessels?—"Because if I put a pin through the outer skin the blood does not flow out, as it would if I had cut a blood-vessel."
How do you know the outer skin has no nerves?—"Because
if I put a pin through my outer skin it does not make me suffer pain, as it would if I had touched a nerve."
What gives color to the skin?—"A jelly-like substance between the inner and the outer skin."
What have you learned about the true skin?—"That it is of the same color in people of every nation."
What difference is there in the thickness of the outer skin? [See Formula.]
What passes through the pores of the skin? [See Formula.]
What is this waste called when it comes from the surface of the skin?—"Perspiration."
When does the perspiration flow through the pores of the skin?—"All the time, if the skin is healthy."
Why do we not always see the perspiration which passes through the pores?—"Because it does not always form drops on the surface of the skin; it generally passes off in very fine particles."