New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1857-05-09

THIRTY DAYS TO AUsrRALrA.-There is something
startling in this announcement because people have
no idea even in these days of progress, that voyage
to the antipodes could possibly be effected in one
month: vet why not We understand that the Gov
eminent contract for conveying the mails is SO days
say GO. Mr.. Clare r, of this town, is prepared TO
build four iron mail steamers OF l0ooO tuns each,
that shall average Twenty miles per f iIat
in case of war, could be applied to the Govern
mept trsnst of troops, &c. Now, what would be the
result Of shortening the voyage 10 Australia to thirty
days In the first instance, we are receiving t1,-
COD 600 sterling in gold annually from that colony;
the interest upon that sum for one month tine time
saved in conveyance) would be fSi0O 900, and the
draft to the same amount, having another thirty
DAYS TO run would make total per annum OF II ooo,-
600 interest which, added TO tSiO OOO would YIELD me
sum of 81 400 600. SO that, in one year tSoVocV
more than the cost of building this splendid heet OF
steamers suitable for war purposes would De reaIZed
merely by the saving of time. Mr.. Clare Is prepared
10 have this number of boats ready in twelve months,
upon the government undertaking TO pay MN sucn
rate of postage the expeditions service ne woud
render would entte him to; and We are satisned the
colonists would not object to an additional postage
that would bring them nearer To ths country
by at least half the time now consumed Aiter
the first year the Government would De ID recelpt
of % 400 600 to meet the expenditure suppose the
exnense attendant upon each voyage was tlU,oOO
that would amount in the year, twelve voyages 10
81 200 coo, thus leaving balance in favor OF the
Government OF II ,200OO 10 attain he con
consideration and many may doubt the possibility;
hut Mr. Glare is quite confident that he can accom-
psh il by the construction Of vessels after plan Oh
his own; vessels that shall not only attain greater
speed than anv hitherto built but be proof against
wind wave, laundering al sea- that can neither leak
nor sink and at the time be shot and hre proof
Surely such a discovery Is of national importance,
above ALI little personal interests, and II practically
brought 10 bear would in time confer lnealculable
benefits upon Liverpool her shpowners, and her mer-
chants.-LirerpoOt Herald.
How TO MEASURE THE DISTANCE OF VESSELS FRox
J,xp-A number of wrecks continually occur from
mistaken estimate of a vessels distance from light
or a beadland Several serious Of this kind
have occurred within the last few months and in
sequence of this the following suggestions for the con-
sderation Of shipmasters and shipowners emanating
from Mr. Rundel the secretary of the Liverpool Com
mass Committee have been posted in the Underwriters
Rooms: By cross-bearings the distance can be de-
termined very approximately, were ships supplied
with proper Azimuh compasses, but on board the
ority of ships this instrument ls unknown; and the
steering compasses, by being placed below inc pIi-
warks or in confined position are quite inappicabe
for taking bearings with q moderate degree of
correctness. But more exact mode than that usually
sdouted for bearings has been suggested and il
has the further advantage of requiring much less time
In execution. We alude 20 the OF the pelOrOus or
dumb-card. invented by Lieut.. Friend, or any similar
instrument Two OF these instruments are required for
the operation, and they TO be used thus one be-
ing placed in the bow of the ship aud the
other in the stern the sight adjusted zero
and with each other At given instant the yanes
Of each then directed the distant object and the
respective angles read off. Having thus obtained
base line and the two angles Of the base the other
sides or the distance Of the ship is obviously very
simple calculation; or by the aid of simple table,
which could easily be constructed by making the
length of the ship the unit of measure the distance
could be at osee seen by inspection, and With az assa