The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1860-06-29

sssoa n Ne Great Esstsvs Asvs bsss asoidsa 30
CO.. ~.
wDmDAS, Juns 2a-IAsst brsszss iron ~ ~ NV.
~ Ne nslns, vhieh vssssd n sP. n 70 Ne W. Set
rysAils and fore tepasib nh morning, 70 tsst ne
aessEsoy Of The ships oonpasses, steamed for my
minutes dus north and for any minutes due south, thus
losing hour forty minutes in the days rum Only one
compass found 70 b. in any way Affected BY the At
tractive power Of the ships hull Very exact and ap
parsnsy very successful means have besn employed 70
sountsract the effect q the iron used In the con-
siruesion Of The ship The binnacles in which the
steering compasses placed enclose pair Of
magnets which can DO adjusted BY vertical screws,
% - 10 counterfeit any deviation or inc
needle. The s determined at see by celestial OBJ
ssrvation, and the necessary adjustment eected oy
keeping the ships head for time in exactly opposite
directions There are other applications all calculated
to the utmost precision navigating the ship
vertical magnet used 70 obviate errors, arising nom
tendency Of the needle 70 Dip denect vertically nom
the perpendicular. This in some happens " the
extent Of hny degrees, and il not prevented, would
seriously Affect The accuracy f course run by the az
ctsd compass his disturbance also produces an oscil-
hten Of the card when the vessel rolls repetition Of
which gives momentum that ultimately causes the
card 70 revolve with such rapdty ~ 70 render COM
payativey worthless guide 10 The hssmen The com.
pass board the reas Eastern are what are called the
pAtnt 1oatpg oompassea An instrument Of this kind con
sists Of an inner bowl, floating In an outer one The
object Of this y 70 render tho inner bowl
insulated in m ssaasry bcd and thus prevent vibration
from actne the centres Of action. The external bowl
u The oay one influenced BY the action Of the ship From
nice mechanical arrangement in the interior bowl, the
hardest gems and the finest centres be applied with
Of these important points nsures perfect indication stcad
ness Of action and estrcme durability and reflects much
credit Mr. Gray Of Liverpool the inventor who fitted
out the great shif. a
Al noon We were N Al deg 70 min north lat, and ~
deg "a min. wcst lon.-distance run 40 miles Inc
paddles averaged revolutions, and tho screw thirty
four pcr minute during ths twenty four hours Tho con-
sumption Of coal for the period was AZ tons ave-
rare pressure Of steam 10 es Towards evening the wind
increased considerably, and by midnight blew up heavy
rain.
TsvRpAy, June 2l.-Commenccd with fresh brcczcs and
light misty weather. Wind hauled again TO the westward
with heavy squalls Of A. eight A. y. took in all gail
One Of the interesting lounges board Of the ship
visit 70 the engine 10 watch the ponderous
masses Of metal revolving with steady, uniform mo-
tion in The performance Of their appointed task Nothing
can be more easy and beautiful than the mode IN which
both screw and paddle engines have worked While
lying at Southampton alterations were made in the
valve gear by which pvmng in tho cylinders seems TO
have been successfully obviaied All who board
during the trial trips viii remember the tremendous
p0uno'ns no'se ~. ~ "o ps~" - ,'"s' ,'o" a''
cause 40 ''e unn''m'co u = -. 0'0u ~ '"o
0y"n'e' '"os' ~. ,'~oy " s' ~. opAs
the remedy which saecdly put stop 10 the DIS
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nsueo 70 MUCH s0eso 'ns' ey "o'o IN" o7sorc
midnight were taken m reope were not que 70 sansune
to-day shout making the shortest passage 70 the westward