The Liverpool Standard and General Commercial Advertiser.
Liverpool, Merseyside, England, 1838-04-27 00:00:00

MENTS.

First,—From the various causes above-mentioned, a saving
of aP least one-third part of the fuel is effected in the patent
engines, or, in other words, injection engines consume half as
much more fuel as the patent engines.
Second,—For every ton of coal that is saved, a ton of profit-
able freight may be substituted.
Third,—As vessels with engines to which the patent improve-
ments are applied make their passage nearly as quick in stormy
as in fine weather, and they do nut require, during or at the end
of their passages, however numerous, any blowing out or clean-
ing of the boilers, to occasion delay, every vessel is capable of
making more passages, and of becoming in that ratio more
profitable.

Fourth,—As boilers supplied with pure distilled water wil
endure a much greater length of time than those in which sal
water it used, not only is the annual expense of the boilers
greatly diminished, but the loss of the tiine of the profitable use
of the vessel, during the taking out of old boilers, and the re-
placing of them with new ones, is also avoided—to say nothing
of the breaking up of the decks, and other expenses 'attending
the business.

Fifth,—As the internal parts of the engines are kept so much
longer in repair, owing to the causes above mentioned, the per-
petual expense and time required in repairing such pacts is
greatly diminished; indeed there is no doubt but the slides,
valves, pistons, and all the internal parts of the engines, are in
much finer condition after having been in operation for years
than they are the first day they are set to ;yolk. The circum-
stance of salt being carried over with the steam into jhe cylin-
ders (when salt water is used in the boilers) is unquestionable,
as wall as that it is the cause of the valves and other internal
parts of tbe engine becoming so soon in bad condition, whereby
a great waste of steam takes place, even long before they be-
come so very much worn as to render it indispensably necessary
to give them a thorough repair.
Some general remarks may now be made on the foregoing
subject, which may not be useless.
In the first place, the increased simplicity in working the pa-
tent engines may be more fully noticed. Th e regulation of in-
jection water and of the water to supply the boilers now forms
no part of th.e duty of the engineer, as they are quite superSeded
by no injection taking place, and the boilers being self-supplied
with undeviating accuracy. It need scarcely be pointed qut
how important. it is to the safety of vessels to have eng,ineqrs
fresh and unfired in stormy weather, instead of being so jaded
and fatigued as not to be able to perform their duty.
In the second place, it may be observed, that the comparative
advantages of the patent engines are, not so great on the first
starting of new engines, or even dcring the fist month or two,—
for then the boilers and machinery of injection engines are as
clean and in as good order as those of the patent engines; hut
after that fine, and when the ,boilers of the former become
thickly coated with scale, and the internal parts of the engines
are warn and galled, while those of the. latter are actually im-
proved, the comparison should be made.
Thirdly,--It is quite certain that a vessel with the patent en-
gines of 300 horse power will effect an increase of economy and
advantages of £2,500 or £3,000 per annum over a vessel having
injection engines of that power; and, consequently, the former
will realize so much greater a profit.
Basfotd, near Nottingham ; and No. 18, King's-arms-yard,
London.

PORT OF CHESTER.—It is with great pleasure we notice the
Increasing manifestations of a revival of trade in this port. On
Monday last no less than sixteen large vessels, from London,
Wales, Ireland, &c., besides numerous small craft, were lying
at our wharfs. This looks well, and argues much in favour of
the improvements in 'he depth of the Dee, made by the exer-
tions of the River Dee Company ; and we hope that the time
is not far distant when Chester will present the appearance it
once did, and the flags of all uatious will be untutled to our
port.— Chester Gazette.