t,
And sing in heaven, while you serenely rest;
On trembling dewdrops morn's first glance shall shine,
Eve's latest beams on this fair bank decline,
And oft the rainbow steal through light and gloom,
To throw its sudden arch across your tomb;
On you the moon her sweetest influence shower,
And every planet bless you in its hour.
With statelier honours still, in Time's slow round,
Shall this sepulchral eminence be crown'd;
Where generations long to come shall hail
The growth of centuries waving in the gale,
A forest landmark, on the mountain's head,
Standing betwixt the living and the dead;
Nor, while your language lasts, shall travellers cease
To say, at sight of your memorial, "Peace!"
Your voice of silence answering from the sod,
"Whoe'er thou art, prepare to meet thy God!"

_Blackwood's Magazine_.

* * * * *

THE STEAM ENGINE SIMPLIFIED.

It is a universal property of matter, that by the application of heat,
so as to raise its temperature, it suffers an increase in its
magnitude. Also in different substances, when certain temperatures are
attained by the application of fire, or other methods of heating, they
undergo a change of form. Solids, at certain temperatures, are
converted into liquids; and liquids, in like manner, when heated to
certain degrees, become aeriform fluids or gases. These changes are
familiar to every one in the ordinary phenomena attending water. Below
the temperature of 32 deg. of the common thermometer, that substance
exists in the solid form, and is called _ice_. Above that temperature
it passes into the liquid state, and is called _water_; and when
raised to the temperature of 212 deg., under ordinary circumstances, it
passes into the aeriform state, and is called _steam_. It is to this
last change that we wish at present principally to call the attention
of the reader. In the transition of water from the liquid state to the
state of vapour or steam, an immense change of bulk takes place. In
this change, a solid inch of water enlarges its size about 1,700
times, and forms 1,700 solid inches of steam. This expansion takes
place accompanied with a certain force or pressure, by which the
vapour has a tendency to burst the bounds of any vessel which contains
it. The steam which fills 1,700 solid inches at the temperature of
212 deg., will, if cooled below that temperature, return to the liquid
form, and occupy only one