The daily union. [volume] (Washington [D.C.]) 1845-1857, 1853-04-20
w. L. MARCY,
Secretary Of State.

ATMOSPHERIC rrLroRApH-The Boslos Daily Adver.
tiser Of Saturday has the following notice OF this new
invention by which is claimed letters and parcels
be transported considerable distances with almost ncrsd
biz velocity, rendering IT practically nearly equal in
speed the magnetic telegraph, which it 10 obvious
has many advantages in other respects The appars
tus is in operation in the Boston Merchants Exchange:
at consists Of tube connecting the places between
which communication is 10 be maintained, in which .
sort OF piston called the plunger is fitted, with loose
leather packing The matter TO be sent is enclosed
bag attached behind this punger Its propulsion is
cured by the pressure OF the atmosphere of ordinary den
siy behind it, that in front being iarihed BY Of
ar-rump producing partial vacuum. This propelling
power 90 great as to produce an apparently nstanta
neous motion OF the punger with its load from end
to the other of The model tube exhibition. which is
about 80 feet long and inches in diameter indeed the
pungeI issues forth with much force when not
hned as TO knock down violently heavy billet OF wood
placed opposite the end OF the tube. if il 10 left open.
The speed is estimated at about thousand miles in
The apparatus is so arranged that there can be inter-
mediate stations upon the line, which the progress of
the punger can be arrested, if preferred pass
directly through 10 the terminus.
"The mechanical difficulties 10 the plan which readily
suggest themselves have been nEeaiousy and apparsnt
y, efectualy obviated by MIR Richardson. The nson-
venence OF The sudden shock occasoned by the arrival
Of he puager al the end OF It's journey is avoided by
arrangement by which portion of the air in front OF
it is compressed and allowed 10 escape but gradually
forming SORT Of cushion to the jolt. The retard-
ing effect OF the friction caused by the motion OF the large
column of air which necessarily follows the plunger in
the tube Ia prevented by the occasional OF
valves in the tube connecting with the atmosphere, to
be opened by the plunger il passes The friction OF
the punger itself is reduced 10 very low point by the
manner in which lis packing is constructed.
owe informed that the apparatus has met with the
approval of several gentlemen competent TO form sound
opinion, who have examined it,
!" The patent right for the machine is owned by the At.
mosphenc Telegraph Company OF which Mr.. Richardson
is agent II is proposed 10 open Tuesday in this
city the subscription books OF company under the
OF the New York and Boston Atmosphere Despatch
Company to construct line between this city and New
York. The tube of this ne il is proposed shall be two
feet in diameter. The cost OF laying down s sstimsted
al 81 900 per mile There will be supply valves often
in twenty five miles, and intermediate statons at
suitable pointsfor instance, at Worcester Springfield,
&c. There will be air pumps at all the stations Hourly
mails may be made up and despatched part OF them at
fixed hours stopping at all the stations and the others
ceeding throug direct 1t is expected that letters and
parcels from New York would be delivered in Boston ia
less than half hour. company able to carry mail
matter this OF speed would be powerful compe
tors contractors for performing the mail services n
sufficient amount OF matter presented, It il claimed that
the actual cost of transportation is not than half
that OF any other method, while is twenty times fast
The line be straight but be curved 40 a 10
follow the face of the ground, or undee the channels OF
rivers. #.
I will be observed that this invention bears some re-
scmbance 10 the atmospheric railway much talked
of at time, but that avoids the objectionable fea
lures OF that scheme the tube closed throughout
II is worthy the attention OF business mem We are in
formed that Mr. Richardson has had successul OPERA
tion line of 3-inch luoe mile in length"