New-York tribune., 1886-08-20
Subway CONCRETE TESTED.
SEVERE PRESSURE OF THE MATERIALS


-ux DORSET coxPaNY CHOSEN To SUPPLY THE
n co>prus-wGrN Tns WORK WILL DE BEGUN.
The pnblic tests of as2haluc concrete for the
electrical condults were made. yesterdfy. uh.c.
the direction of Professor A. X: La.ouN. t.c
cneu,ist of the subway Commission. at the ar
SSaanls testing worAs No. 50 Tho onas-st There
were three principal tcats made. Inform niooAs
nj each companys mdteiia were sunlec'v" ~ VI
sransx.rsc strain: the conduit sections oi eacn
,are tried in the same way, and iastiV tiic ano""t
of resistance that tho various materials ohv..s t
against compression was assertahed IN, III ss some
nj the others ult in the two other trlals the' su
ra.scd nearly all the Others. Commss99ners Ia
and Hess u. II. Dorsett. Engineer Coillhswo1u'
Sarmerly of the Bridge J X Burlick. Osborne PC,
Daniel A. NJ Rice. j. q. fost ana seVeraI ,V"' Ar
manufacturers were among those ptessns ,ests
Olsen of Fairbanks 4 Co. couhucte" tnv ~
There were thirty nine made IN al OF s"ihP'',
mittei by tho following hrins: ~ H. Io'souno,al
Co. Henry Boi,e. George RichaTds1,n' wnrss Bar
Asphalt Company. Ncw.YOrk Mas'ic W"1Ns' r." Co
bcr Asphalt Company alender ana Ioo.o ".,, as
The rst test in regard to transverse "m.
male on the samples sent oy sohd concrete thirty
inches long and about six inches slui and the
block bloke at pressure oil ,ovios eovy /" breaking
tse second one showed detection OF about na,, an
inchY Then two blocks OF the Mas, s., sn",s;neS
were placed N the nds machine and detection Of one
and one-haf inches bat tho othct nI1ne & a, ~ 10
pounds The first block ,%e u.copd block broke at
LEO nonnds There was marked difference IN
- ~. .,rsnsth of the two blocks OF Barber q 20
fhe srst sustained pressure OF i,3so pouhds ana
.no,h uno only 26o. IL also detlected about an
IN The two samples were made according TO
S,Ge,ent formulas. Mr.. Boze handles the Ger
,,an rock asphalt His block deileciei an men ana
I,oke at Z. 200 pounds One Of the feroll blocks
which had several iaws in u. split at ,osu tnt u
took weight of $40 pounds 20 break tIe snr "s"e,
I eionx said that while he thonglt al OF tbem
would have stood greater weight. yet he thought
nearly all of them would answer
a A.. sect
,f earbnuiyed Portland cement belonging To Ie9ree
richardson was hrst placed upon the two uprlshls'
~ was thirty inches long, cylindrical IN shape,
and contained four holes IL broke nc 500 pouniS
ur,ssure The second tired Twas Barbers. IL was
al.o thirty inches long. but vas rectahgqliai III ~
sl,u. with the same number OF holes "a klcbhrd-
sons A weight Of $50 pounds broke IT, oiock
cf the Calender conduit the same size carried
4 800 hounds before il gave way Inc one onerou
Lv D,r,ett was section like that used by this com
many in Chicago II wa thirty inches IN ientln'
eight hy sixteen inches in size anu contalneh leu
holes two less than will be required in the sub
avs here There was quiet smile OF satisiactloh
ON the face of Mr.. Dorsett and hs partner, MT BUR
dick. when the register Indicated pressure ol
5000 pounds. This broadened consideraoIy wnen
10 900 was reached and when az last the scctleh
gave way at 1880 pounds they seemed 10 DC
a. none of the other firms had their material in
the form of conduits the crushing test was ordered
Cubes of each material offered were tr'ed. one OF
NcucLstel Company. of about four inches OF sur
,ors sustained a pressure of ll,0OO pounds and
another $3.50 pounds -Four samples Ot the
MOott IN concrete OF the same SIG melo u,ou
with the following results: No ], $500 pounds :;
No - 2O.7lO; No. 3, l,sOO. and NO. =. i1,'So
-Four samples Of BARRIERS gave: No /, 3'oOo; NO.
o3.7O: No. 3, $500, No. 4, 6,i7O. cnbe OF
polyes of nine square inches Of surface stood 900
pounls and another 7,ll0 Lastly large cube oi
Mclntyres. thirty-tuur inches oi suiiace stoou
IOi s,,O hounds or about 5000 TO the square incH.
Ioole's Feroid. stood 22,250 pounds Professor
iedpux put a broken piece of conduit OF the Dor
sett Company In the machine ~ stnon eausrn ;5
over fieen times the weight that it would ever he
subjected 10 when placed under ground. tex'lle
fest was also made of the Dorsett material. IL re-
s1sted GO7 hounds DDrsctt n 20. have niteen
miles of condults laid in Chicago and are laying
several miles IN Brooklyn they also nave nr Goi
factory il at the foot Of East Iwenteth,st Mr.
Dorsett and Mr.. Burdick clam to be the only
members Of the firm ana emphatlcaiiN uyiy eua.
Maurice B Flynn has or ever had dollar worth
OF interest IN their patents Mr. Dbrsett SAID;
lie came tousla January when we thought that
,ncfe Was SOU likelihood Of getting the work and
tried to buy an IN nrm But he Was s nc, nc,
willing TO sive us what we asked and so we did mol
trd. lie also veni.tO all the other companies that wec
bidding the job and made similar onertures Vut , no
think he bought any St nDa ps we
shall be really In do to-day TO evo them 300 rec,
thc work is completed There are fifteen machinsts al
work now making machines for our suoways'
Pre- fessor Ledcux said that he would write to the
eonstruction company to-day IN regard to the tests
lie will say that all the asphats tried oan he MADE
10 do the work and will ask the company 70 select
one ot them When this is done he will analyzc the
the material Of the Dorsett Company he SAID:
Iwas opposed to coal 'ar pitch. IKE almost AL SCI.
entine people, for u has generally been proven 10 be
moor al for Sidewalks made from it dlsin-
t.grato rapidly owing TO the is affected by the
extremes OF temperature ina that sewer-pipes laid
the COMPANY n CHICAGO the" years ago are as
good today ss ever am Obliged 10 confess thst tnls
companys mater" has uo"e '"' 'o'' =" e''s'"' ~
far
The Consolidated Company is of the same opn-
ion evidently for as soon as the tests we're inadt
the officers went TO Mr.. Dorsctt and arranged witt
him for supplying The conduits- A meeting OF the
directors OF this company was held IN the afternoon
and Ewad Baltbazar. the treasurer. was CHOSEN
temporary president IN place or Henry Fltzhugt
who resigned on Monday. Mr. Lantcrbach SAID
that the company would be ready 10 begin work ON
next Wednesday, adding:
We have all the money need; our contracts Tor the
work of excavaiou will be made tomorrow and every
thing else Will resdy In due time. The statement
published about Flynn being here At meeting OF the
Consolidated Company of any errand connected WIN y
IA TO mt n plainly, n downright lie. Mr.. flynn has
client OF this firm for years, but ne mas 10 more
with the construction company thau h@s he st uo
O Bartholdis Liberty.