The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1851-04-24

IA M
common with the earth. II is true that, CORRECTLY
speaking, the table does not turn round its own
centre but round the axis Of the earth; never
theless the effect Of the motion relatively TO tina
pendulum suspended over the centre Of the table.
i precisely the same Ii would be if the table
moved cnce in twenty-four hours round its own
CENTRE fer although the table be turned, in common
with the surface Of the earth, round the earth's axis
the point Of suspension of the pendulum is turncd4
also in the same time round the same axis, being
continually maintained vertical above the centre OF
the table The plane in which the pendulum VIZ
bratcs does not, however, partake Of this motion,
and, consequently, has the appearance OF revolving
once in twentyfour hours over the table, while, in
reality, it the table which revoves once in twenty
four hours under 1t.
Steamboat building on theClyde.
From the Glasgow Mail, March 81
While considerable dulness pervades some
branches of manufac tures, we are happily ena-
bles to state that in the great department of steam
boat building the utmost activity prevails Indeed.
we que -tion whether, in any previous year, the
leading engineering establishments of the Clyde
have presented such an aspect of business and
hustle they do at this moment Mr.. Robert
Napier has contracts on hand comprising no fewer
than thirteen vessels-mostly Of large size-ether
to complete them from the keel upwards, or to fit
them up with engines after being built elsewhere.
Among the former four magnificent iron stcani-
ships the paddle principle building in tho yard
ut Govan, for the Pacific steam Navigation Cora
pany. Each of these vessels will measure 200
tons, with engines Of 400 horse power. The first,
understand, will be off in June, the others fol-
lowing at intervals Of two months. Mr. Napier has
likewise commenced two noble screw :tea ners, Of
$50 TONS and $50 horse power, to run between
Liverpool and Constantinope, in connection with
the Grecian, the Arabian, and the Astrologcr..
Another of 700 TONS and $50 horse power, for
the Glasgow and London trade, will be ready, it is
expected, within three months from this date. The
same eminent builder has also hand an iron
sailing vessel CT 800 tons, for Mcssrs kidston Of
this city; and steam pleasure yacht, with paddles,
of $50 tons, and l20 horse power for Ashton smith,
Esq, late Nj. p. for Andoyer being, VIC believe,
about IL eighth steamer built for that gentleman,
doubt the most princely steamboat fancer of the
age. But the chief throng of work is in the engine
making department Of Mr.. Napier's vast establish
ment. Tie visiter to the Vulcan Foundry may
witness pairs of engines, each representing col
lectye power Of 800 horse, in preparation for two
by Mr.. Robert Steele, for the Cunard line.
These noble vessels will be 400 tons bur
then, being considerably larger than any of
lau1 ched in August, and the second soon after
wards. Engines Of 800 horse power are likewise
making by MIR. Napier for the Magdalena a steam
of 1900 tons, at present building in the Thames
by Mr.. Pritchard, for the West India Mail Steam
Navigation Company; besides engines Of ,O00ho
power for the Agamemnon, wooden line Of battle
ship, on the screw principle, building at her Males
largest screw power adoat. smaller war steamer
or frigate, named the Miranda, has just been
launched at Shcerness dockyard, and will be at the
Broomielaw in about month, to receive her ma
chinery from the Vulcan. Like the Agamemnon,
the Miranda is to be propelled by screw, with en-
gines of $50 horse power. Messrs. Tod X MPGre-
gor nearly as busy Mr. Napier, having work
in progress sufficient to keep all their hands fully
occupied fer at least atwelvenonth to come. This
enterprsipg firm have at present on the stocks a
first class steamship of 2, 100 tons, and $40 horse
power, with screw propeller, intended to ply, as
consort to the favoritc City Of Glasgow, between
Liverpool and Philadelphia. She IS to be chris
tened the City of Philadelphia and will be finished
in July. large screw steamer Of l, 800 tons, and
$40 horse power, for the Glasgow and New York
trade is likewise in state Of forwardness in their
building yard at Patrick. This vessel has been
started by spirited joint stock proprietary, incud-
ing several Of our leading Glasgow merchants, in
consequence Of the brilliant success Of the recent
experiment made by Messrs. Tod & MGregor Of
direct steam communication between this city and
the great commercial capital of the United States
She IS expected to be ready early in August, when
she will doubtless be hailed the FIRST OF a really
"royal line" In addition to two small paddle
steamers-the one n river steamer for Cork and
the other pleasure yacht for Southampton,
Messrs. Tod x McGregor arc about to lay the kees
Of two powerful steamships of POO TONS and
go horse power, for the Peuinsular and Oriental
steam Navigation Company. We also understand
that they have just contracted for q screw steam
ship Of l 400 tons burthcn. Messrs. Smith 4 Ro-
ger IRE building beautiful steamer Of as tons and
~ horse power, for the Dublin and Liverpool trade
The esta bshment Of Messrs Thomas Wingate &
Co. has just produced handsome addition 10 our
feet OF river steamers This vessel made her trial
trip last Saturday, and proved, We understand, q
clipper. She is to ply between Glasgow and Loeb
Coil, and is called the Ardintenny. Messrs. VIM
gate Go. have three other yes sells in hand name
ly, paddle steamer Of 500 tons and 300 horse, to
ply between England and France screw steamer
OF similar size, for the same trade: and a river
paddle steamer for Australia. In Clyde Bank
Foundry, MesHs James x George Thomson arc
busy with engines Of 300 horse power, for splendid
paddle steamer Of COO tons, lately launched from
the building yard Of Messrs. Wood 4 Reid, Port
Glasgow. Alessrs. Thomson have also contracted
for engines Of 100 horse power for screw steamer
q tons Mos Wnnl L. Ro;l
present building, to ply between Liverpool and
Sonstantinople. 1T Renfrew, Messrs. Henderson
Son have q large steamer on tho stocks, besides
rchtting various other vessels for the Clyde Tho
Dumbarton building yards arc, in like manner, alive
with the clang of well employed industry. Ncssrs.
W. Denny Brothersare building for Messrs. ]. q.
Burns two screw steamers Of 800 tons each and 100
horse power. to ply between Liverpool and Con-
stantinope, IN connection with the Shamrock and
the Margaret, besides having other vessels in pro-
gress; while Messrs. Alexander Dcnny l. 60. are
engaged on superb river steamer, fitted up with q
ladies' saloon on deck, and otherwise presenting an
appearance at once elegant and unique. The latter In
about 100 feet IN length, and Is to be supplied by
Ncssrs. Campbell Macnab, Of Grecnock, with
oscillating engines Of ~ horse power. 4 select
party intend ayaling themselves, we hear, Of this
handsome craft in order to visit the great London
Exhibition. and her owners profcs. themselves
hient that she will create little sensation in
the L names. At Port Glasgow and Grccnoek the
steamboat building trade is equally brisk. In al.
dtion to the large operations going on in the build
ing-yards Of Messrs. Wood Reid aud Mr.. Robert
steele, to which We have alluded, Messrs Card a.
Go. are making engines of 100 horse power for two
wooden .hp-, building in England. of 800 tons,
for the West India Mail Steam Navigation co.
Messrs Caird X Co. are likewise making engines
Of loo aud 200 horse power respectively for two
ses building ut Duinbarton by Mes.rs w, Denny
Brothers. and also engines Of 100 horSc power for a
paddle steamer building for Messrs. 7. 4 -. Burns,
los the Glasgow and Liverpool trade to be called
the Stork A paddle steamer &C 500 tons and $50
horse power, is in course Of construction, by the
same firm, for the Trinity House, Dublin. to be
employed, we understand, in the lighthouse service
~ Will thus be seen that really mag nifccn. feet
OF steam vessels, Of all sizes, and intended to nav-
gate many OF the rivers, and nearly all the great
oceans OF the globe, is about TO 20 forth a. the
crop Of single season, from the buldng-yards and
engineering workshops of the Clyde. While we re-
joiec at the indications afforded by this prosperous