New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1845-01-17
Conventional rieetinss Of tie America: =
Institute.

Institute.
s.Lee,-PAyrAxsrs-ptofes.of MAPEs in tie CHAIR. "
NEIss, Secretary.
Among the experiments made N this City, vi %
wooden pavements none have been properly cor
Quoted Ills tue almos; every kind oil bottom e'
suhsrnturn has bsen used bat ia 20 instance Eevc
toe blocks been properly prepared before being 4
down. 4. proof that wooden ravements may u
used under some circumstance. the streets Oh -.
Petersburg, in Russo, ars paved with ~0cdsH
blocks, and they therr, have been lonnd 70 answtr
the purpose perfectly we'll
The experiment, made in Broadway, has tnres 10
reii.s Of preparation 0ue-,hird has subetratpm %
dat s,ore, one.lhirl Of the ordinary pavement ani
one-lhrd Mac Adamized bottom. Alter the blocks
were laid down, their upper surface "us groutei
with tar md covered with gravel and building sand
The blocks. however mad received no previous pr
pare,ion To prevent their decay.
4 Member present stated The cause OF wood Creek
iDg mn! deca,iag. t!e sad that the aqueous pof-
tons ,f the tree contained the constituents OF tins
sap in solution as the wGtery particles were evelo-
raied from the outer surface OF !he tee, tSoSa T.,
naming retired towards the heGrt carrying WIZ
them all the constituents OF the sap; thus when TN
heart became perfectly day, the capillary tubes the
were CON erely filed with solid matter. IL at hri
future period ih's solid matter should receive mos
ture il would se.eli with an uncomfortable ioTCt,
coa,iHgs Of he block were rent asunder In ottef
cases. wneie the outer ANGULAR rings were inclinei
TO expand rather than crack the pent-up sap con
tanning email quantity o. saccharinc matter or Iig
constituents underwent fermentation ubd decay, or
rot was ths consequence.
Modes of Preserrat;on 1roposed.--If wood be SD
tora,ed with very weak solution e lie BicA!orida
OF Mercury, fc0rrOsioe su6tmots a change IN the
character OF the solid parts OF The zap wall be elect
ID Ii will no longer swell from moisture, and cor
-, ...ay (lr ~ rIN
blocks be held uoder ordinary plumbers solder, OF
any other metal fusibtc, low heat NIL the mos
lure as we'll as the mir contained III HE capillary
tubes will te driven cut. Vita the help OF pro
perly constructed longs the block may he suddenly
transferred from this under The surface c liquid COZ
tar cold. The passage Of the atmosphere will force
this coal tar nto all its capillary tubes. Blocks
FIRST kyaniseJ, afterwards subjected 10 the above
process and then placed on subsuatum ,hl'
would freely lie; water pass through it, would b
imperishable nearly After the blocks are iad,
tiey should be and grouIed with not tar
which should be placed clear grave! free from oaiH
few DAYS Wear would force this gravel into h'
end o! the grain OF the wood, thus producing q
Toughened tnamelcd suiiace or an lndestructlh q
material.
The Advantages OF wooden pavemerts ;hnt
carriages create less noise IN passing over them, ao
their first cost is much less Than granite blocks.
A full account accompanied with engravngs OF al
the patents granted fos the different kinds OF wood,
tory, vol 3.
With al! kinds of pavements the subs,rntuar
should freely pass water by filtration or the a.
eumulaton Ct water, on freezing IN the winter
time, will loosen and force up The pavement
The want OF this precaution caused the desiru"
ton Of the wooden pavement 10 the upper part "'
Broadway and Blocker street evenbeiore the blocks
had cracked or decayed al all.
Wooden pnvemenis would also be much preserved
by slightly carbonzng their surfaces.
MANY members remarked upon the SUBJECT Oi cos,
iron pavemeD's. The, mad been ssversl times med
in Europe and abandoned, only from the fact tir
IN they would wear smooth and cause horses 10 slip
m All the experiments ~ aspNalium pavement VII ca
have been tried in this country and elsewhere Were
~ also reci;ed. IL stated that Judge Wright had
~ proposed style Of asphaltum pavement dferirs
" from the specimens now in our Hall Of Records, b;
the introduction Of small stones between the lare L
ones previous 10 grou,iDg the mass with asphalsum
The objections made 10 this species OF pavement
were that heavier loads impngiug on the upper 50:
face of single stone, which presented but a small
area ut lis base Tor support on the asphaltum, would
be forced Extraordinarily TO crack the aspbalium
between Itself and the neighboriug stones. Dir
would work into this fracture, preventing recohe
sion, end thus IN 4 short time the pavement wouio
be entirely destroyed The experiments made a
Delmonicos, Brandfehs walk in Broadway art
few other places in this city, have clearly provsc
that asPhaitum is TOO soft, under the action of OH
summers sun, and brittle in tho winter lime {,
be desirable as n pavement IN this climate.
UrGHNS 6fOckS.-l ms ttNle 81 pavement Ha
been long used in London with complete success
In Philadelphia, al the uppSr corner OF the Stat
House, in Chestnut-street, piece OF stone pave
rnent which has been ia use IL years without ar,
apprecisble wear; many parts oil II have been tak'
up frequently for the introduction OF gas and wute
pipes, and found TO be easily replaced without ere
atng any unevenness Of the upper surface.
Granite pavement has been several years in list
in front of the fremont House, Boston. Ii wS'
suggested that from the large amount OF granite i;
he vicinity of this CITY, it would be the most advisa
bic pavement. The blocks should be cut in the form
of six-sided figures, and the clippings from the s
blocks would form proper material tor founda
ton. No figures can be so compacuy placed, or rrn
Dur 80 much mutual support 10 each other as block
OF this form The first ugh.cutting mil hit be per
formed by our BLACKWELL : Island prisoners the nm
ish, however, should be done by planning machine
similar 10 that now used tor planning iron. Ii ha:
been found where this style OF pavement has beer
adopted that difficulty occurs III the taking up
md replacing the pavement for the purpose OF intro
ducing water gas piPss. When the earth is re-
placed 1t should hc thoroughly wetted, which viii
cause IL 10 settle sink Immediately TO firm uua
terable bearing. Ga this the clippings or substrr-
tum 10 laid, and tho pavement Is again tirm All
durable.
All payemarts composed OF regular shaped bloch Is
should have their line OF joints diagonal the sup
posed line OF travel. Where this is not the case, The
joints wear apart by the action of wheels as is si-
ready the condition with those in the train way in
the upper part OF Broadway.
Much desultory matter TO the proposed indi.
rubber pavement, now under going experiment in
London, and other modes OF paving roads was in-
troduced. That part Of the Message OF the Nave
relating 10 repaving the city, was read and failJ
discussed.
We have given above the more important facts
ELECTED this Conversational Meeting but our space
will not admit stating all the interesting mint
ta which took place.
These meetings, which occur every Wednesday
evening, free 10 ell who choose 10 attend them
and We know OF no method by which those who have
themselves in the useful applications OF the SET
ences.
AsoLiTIoSisTs IN SOUTHERN PRlsoNs.-Seveo
persons from the North are now in Southern prisons
for assisting Slaves TO away from their masters.
Thompson, Work and 8urr-formery students in
Dc Nelson's Mission Insi;tn,s-.-. in IL. a,:sss;