enjoyed in this way than by any
other mode of exercise. Where it cannot be used, walking, or
exercise in a carriage, ought to be substituted.

The best time for taking exercise is before dinner, for the body is
then more vigorous and alert, and the mind more cheerful, and better
disposed to enjoy the pleasure of a ride or walk. Exercise after a
full meal disturbs digestion, and causes painful sensations in the
stomach and bowels, with heart-burn, and acid eructations.

But whatever mode of exercise you use, it ought not at first to be
too violent. Dr. Armstrong has given us an excellent rule--

'Begin with gentle toils, and as your nerves
'grow firm, to hardier, by just steps aspire.
'The prudent, even in every moderate walk,
'at first but saunter, and by slow degrees
'increase their pace.'

THE END.

R. NOBLE. Printer,
Old Bailey.

NOTES.

[1] Hinc tibi, quae semper vicino ab limine sepes
Hyblaeis apibus florem depasta salicti,
Saepe levi _somnum_ suadebit inire susurro.
VIRG.

[2] May not the heat, and want of perspiration, depend on an
exhausted irritability of the subcutaneous vessels, which will be
accumulated by the method here recommended?

[3] Oxygen gas, according to the new Nomenclature.

[4] The fixed air, or carbonic acid gas, formed during the
combustion, having been separated by agitation in contact with lime
water.

[5] Strictly speaking, water is composed of the bases of these airs,
the greatest part of the caloric being given out on their union.

[6] Where manufactures are carried on to a great extent, the air is
rendered still worse, and every precaution ought to be used to
preserve the health of the inhabitants. Places where manufactures are
carried on, ought, therefore, to be constructed in such a manner as
to be very lofty, and capable of being easily ventilated.
Night-working is undoubtedly a perversion of the laws of nature,
renders the constitution feeble, and lays a foundation for bad health
and disease: for it not only gives no time for ventilation, and in
consequence the quantity of oxygen becomes more and more exhausted;
but the number of candles used, contributes very much to contaminate
the air. It has been found by experiment that a candle contaminates
more air than a man. By persons who are interested in the welfare of
the succeeding generations, night-work will never be urged, and it
will be right to ventilate the manufactories every night, as well as
during