, Latin, Greek, and French, languages.
She accompanied her husband (Edward Wortley Montagu) on an embassy to
Constantinople, and her correspondence with her friends was published
and much admired. She introduced the practice of inoculation for the
smallpox into England, which proved of great benefit to millions. She
died at the age of seventy-two, A. D. 1762.

_Moral Philosophy_, the science which treats of the motives and rules of
human actions, and of the ends to which they ought to be directed.

_Moreen_, a kind of woollen stuff used for curtains, covers of cushions,
bed hangings, &c.

_Mucous_, having the nature of _mucus_, a glutinous, sticky, thready,
transparent fluid, of a salt savor, produced by different membranes of
the body, and serving to protect the membranes and other internal parts
against the action of the air, food, &c. The fluid of the mouth and nose
is mucus.

_Mucous membrane_, that membrane which lines the mouth, nose,
intestines, and other open cavities of the body.

_Muriatic acid_, an acid, composed of chlorine and hydrogen, called,
also, hydrochloric acid, and spirit of salt.

_Mush-stick_, a stick to use in stirring _mush_, which is corn meal
boiled in water.

_Nankeen_, or _Nankin_, a light cotton cloth, originally brought from
Nankin, in China, whence its name.

_Nash_, (Richard,) commonly called _Beau Nash_, or King of Bath, a
celebrated leader of the fashions in England. He was born at Swansea, in
South Wales, October 8, 1674, and died in the city of Bath, (England,)
February 3, 1761.

_Natural History_, the history of animals, plants, and minerals.

_Natural Philosophy_, the science which treats of the powers of Nature,
the properties of natural bodies, and their action one upon another. It
is sometimes called _physics_.

_New-milch cow_, a cow which has recently calved.

_Newton_, (Sir Isaac,) an eminent English philosopher and mathematician,
who was born on Christmas day, 1642, and died March 20, 1727. He was
much distinguished for his very important discoveries in Optics and
other branches of Natural Philosophy. See the first volume of 'Pursuit
of Knowledge under Difficulties,' forming the fourteenth volume of
'THE SCHOOL LIBRARY,' Larger Series.

_Non-bearers_, plants which bear no flowers nor fruit.

_Northern States_, those of the United States situated in the Northern
and Eastern part of the Country.

_Ordinary_, see _Physician in Ordinary_.

_Oil of Vitriol_,