indeed, is a knowledge which few young women possess; and yet it is a
knowledge which no young woman, who would do her utmost in the work of
self-education, can dispense with.

She wishes, perhaps, to improve her voice by conversation, reading and
singing. But is she qualified to do this in the best possible manner,
while she is wholly ignorant of the structure of the lungs, the wind-
pipe, and the fauces, as they are called--parts so intimately concerned
in the production of voice and speech?

She wishes, perhaps, to develope and invigorate her muscular system in
the highest possible degree; but how can she do this, while she knows
almost nothing of the nature or power of the muscular fibre?

She wishes to develope and cultivate her intellectual powers; to
acquire "firmness of nerve and energy of thought." But how can she do
it, if she is ignorant of the situation and functions of the cerebral
and nervous system--that wonderful organ of the intellect?

She would train her eye in the best possible manner; but how can she do
so, if she is ignorant of the nature and powers of that wonderful
little organ? She would educate, properly, all her senses; but how can
she do it, without a knowledge of their structure, functions and
relations?

Perhaps she would study the philosophy of dress, and of eating and
drinking. How can she do so, till she understands, intimately, the
relation of the human system to air, heat, the various kinds of food,
drink, &c.?