New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1842-12-22
T. w. DoKR, Esq.

Nautical IsygNrloHs The London News
contains the following notices of important naut
cal inventions recently made in Engl
The SlLLoMsTER has dial upon deck, which
constantly shows the number of miles per hour Tie
vessel is going consequently II is easy TO discover
apder all circumstances, what Is the pest trim Oh
the vessel, ard the most advantageous quantity ara
distribution of the sails for obtaining the creates,
speed As the sillometer shows immediately the
efec, which every alteration in the sails or trim OF
the shin has on its velocity it follows also that
ships fitted with the sillometer can constantly
maintain the speed they may have agreed upon
and SO keep company together, and MAINTAIN the
same relative position; though, from the darkness
of the NIGHT or thickness of the weather. they can
not see each other To ascertain the distance run
after any number Of hours, it Is simply to take the
number of minutes one of the watches OF The slilo-
meter has gained over the other, and to multiply
that number by six, which gives the distance ran
in miles.
The MARINE THEsMoMETER.-The trials with
this instrument on board the Lightning COM
mepced a, eleven o'clock on Thursday morning,
October l3. Previous to leaving Woowlch har-
Dor, and on taking the centigrade II was iouna 20
lac u degrees At twenty-five minutes past lhtee
O'Clock, 2. NJ, in five tathen channel; Cant shoal,
depih of water about 16 feet, it Indicated 1879.
In % feet depth of water as stated by the pilot, 1t
indicated Is 25. Of Dover 10 degrees, and IN
Portsmouth, harbor l4.2. From these indications
it oppears that the marine thermometer in it, We
ria,ons. followed the inequalities of the bottom OF
tho sea. so far as these inequalities could be as
cer,ained from the heaving OF the lead or from tie
information OF the pilot; that is, on the approach
10 shoal water the thermometer tell, ana on 'he
approach To deep water it rose, ana d'Stlhgulsheo
the difference very distinctly and rapidly, accord
ing TO the transition from shallow 10 deep wa'e!
and rice versa. 1t may therefore he inferred that
the marine thermometer would Indicate Inc APP
proach to rocks and icebergs from Inc lhhuehce
these bodies are known 10 have on the temperature
Of the sea for considerable distance. The DIAL
Of the marine thermometer is also on deck, ana
shsws, By inspection merely, the exact depth OF
water in which the vessel may be sailing at the
time.
The STEAM THERMoMxrER.-The principal ex-
periments with this instrument were made In the
Midway, and the observations taken show dis
tinclly how every variation III the temperature of
the steam in the boilers is indicated by Monsieur
Clements invention, centris rade of l07 degrees,
fonr degrees OF Monsieur Clements being equal TO
2lo degrees of Fahrenheit. his invention may be
OF value where nigh pressure engines are used, as
j, indicates the exact temperature of the in
the boilers; bu, the engineers in the British navy
are so careful and fully qusliEed body of men
,ha, no fears need be spprehended by the com'
manders ofvessels of their attention 20 their duty,
so that this invention may not be required.
UeA son of Mr.. John !. Anderson, of ST Louis,
died in about twenty minutes, on The 2Sih si,'
from an attempt TO swallow something winch
lodged 10 his throat, and produced death before
medical relief could be procured.