The Sun.
London, England, 1830-04-05 00:00:00

JULIO ROMANO. Lon:xis, 1830.

We have just perused Mr. Bucke's new Epic
Drama, in six books, entitled 44 Julio Romano,
or the Force of the Passions," and have not
been a little gratified. The language is poetical,
and in places redundant, but uniformly spirited
and expressive. We think, however, that the
author is more likely to shine as a poet than a
dramatist. His genius is not dramatic enough
to ensure him any great popularity, whereas his
poetic abilities are far above the level of the ge-
nerality of our modern " versers," as the late
Mr. Elwes used significantly to term them. He
has no sing-song cant about him, and this is no
less a recommendation than a novelty.

DARLEY'S FAMILIAR ASTRONOMY.
LONDON, 1830.

There is a vast deal of astronomical informa-
tion conveyed in a most winning and unassum-
ing manner in this delightful little volume, which,
not less for the novelty of its plan than the extent
of its intelligence, reflects infinite credit on the
task and talents of its projector and editor, Mr.
Dailey.

A TREATISE ON AIECEIANICS..---LONDON, 1830.
This lucid and scientific dissertation, from the
united pens of Captain Kater and the Rev.
Dionysius Lardner, forms the latest volume of
Longman's popular " Cabinet Cyclopedia.'

The! c, technical phraseology in the style,
which is sinyle and intelligible to students of
the very homeliest. capacities. Such a treatise
on ineehanies.,n:science which hitherto, though
ably and repeatedly, has been taut too elaborately
and technically illustrated—was much wanted,
and the present volume is the very one of all
others best calculated to supply the deficiency.
We present the reader with a few miscellaneous
extracts :

" TO REMOVE A TIGHT STOPPER FROM A DECANTER,

" It frequently happens that the stopper of a glass bottle
or decanter becomes fixed in its place so firmly that the
exertion of force sufficient to withdraw it would endanger
the vessel. In this case, if a cloth wetted with hot water
be applied to the neck of the bottle, the glass will expand,
awl the neck will be enlarged, so as to allow the stopper
to be easily withdrawn."

" METHOD OF SAVING THE WALLS OF A BUILDING FROM

BEING 9SSTROYED BY THE WEIGHT OF THE ROOF.
" The contraction of metal consequent upon change of
temperature has been applied some time ago in Paris, to
restore the walls of a tottering building to their proper po-
sition. In the Conservatoire des A;ts et Métiers, the
walls ot'a part of the building were forced out of the per
pendicult;r by the weight of the roof, so that each wall
was leaning outwards. M. Molard conceived the notion
of applying the irresistible force with which metals con-
tract*, cooling, to draw the walls together. Bars of
iron were
iroa were placed in parallel directions across the buildi;,v,
and at right angles to the direction of the walls. Being
passed through the walls, nuts were screwed on their ends,
outside the building. Every alternate bar was then heated
by lamps, and the nuts screwed close to the walls. The
bars were then cooled, and the lengths being diminished
by contraction, the" nuts on their extremities were drawn
together, and with them the walls were drawn through an
equal apiee. The tame process was repeated with the in-
termediate bars, and so on alternately until the walls were
brought into a perpendicular position."

"COLLISION OF BODIES.

" When two bodies moving in opposite directions meet,
each body sustains as great a shock as if, being at rest, it
had been struck by the other body with the united forces
of the two.

" For this reasoti; two persons walking in opposite di-
rections receive from their encounter a more violent shock
than might be expected. If they be of nearly equal
weight, 'and one be walking at the rate of three and the
other four miles an hour, each sustains the same shock as
if he had been at rest, and struck by the other running at
the rate of seven miles an hour.

.0 This principle accounts fur the destructive 'effects
arising from ships running foul of each other at sea. If
two ships of five hundred tons burden encounter each
other,'' sailing at ten knots an hour, each sustains the shock
which; being at rest, it would receive from a vessel of one
thousand tons burden, sailing ten knots an hour."

" MECHANIcAL COLLISION EXEMPLIFIED IN PUGILISM.

"It is a mistake to suppose that, when a large and
small body encounter, the small body suffers a greater
shock than the large one. The shock which they sustain
must be the same : but the large body may be better able
to bear it.

" When the fist of a pugilist strikes the body of his an-
tagonist, it sustains as great a shock as it gives; hut the
part being more fitted to endure the blow, the injury and
pain are inflicted on his opponent. This is not the case,
however, when fist meets fist. Then the parts in col-
lision are equally sensitive and vulnerable, and the effect
is-aggravated by both having approached each other with
great force. The effect of the blow is the same as if one
fist, being held at rest, were struck by the other with the
combined force of both."

THE POLAR STAR.—LoNnox, 1830.

The last number of this well-selected and
condensed miscellany has just reached us. It
contains almost every thing worthy of notice that
has appeared in the different periodicals of the
day fox the last three months.