New-York tribune., 1886-08-28
PREPARING FOR sUBwAYs.
HOW THE MATERIAL Is MADE READY.
grll rHx COMPANY BIZ KNJorxEp f-rHE INDEH'
NIFTY nONn

NIFTY BOND
The Subway Commission received letter yester-
lay from the counsel Of the North American Under
hst the specifications ior the subways were an
infrnRcmcnt upon its patents ana tbas IL Va
81 chs kind have been rec",vcd that it has become
On old story and tho commissioners pay little asMh
tion 10 them. Il was reported yesterday that ths M
VSfk a. soon Is II begins on Monday for the purpose
Of forcing tho consolidated company to adopt sne
Johnetone patents which IL controls. instead OF
,sray that he a not ' SssVe the
any one else would attempt such thing Inc sta!e .
mrnt that tho commission had not received .ta tne
Company Is not true. The engrossed bond has not
been delivered. but the provisional one 10 now 10
tho hands Of the commissioners MT iSwet tmss
that one of the bondSmen slone Is worth nve Times
the amount Of the bond and that only one o.
those Who originally signed II Will be dropped
sToe fact be ccntlnuSd1 m H.SiS s3o iO DOZEN
that he considers the company oil right and able
The Dorsett people cay that they viii be able to
duit day from this time forth. They got their
W,i oSsSly Gu's not cast any sections unt next
week. The method OF Masking tho ccnduits ts
simple. The Ingredients Of the concrete are coal
the sand Is s placed IN An inclined cylinder three
feet IN diameter and eighteen feet long. Underneath
this are furnaces. Ab tuo 6auO runs uVWu tuio ~
10 thoroughly diied before reaching the bottom and
ont of which 1t passes into pit From this 1t Is
taken to the top Of the factory BY bucket
elevator and carried to the different hoppeu by
screw conveyor. These hoppers discharee by
means of valve into the mixing pans below them.
The pitch 10 melted in large steam covered iron
tank. about eight feet long through which Q shaft
runs with aims projecting from 1t for the purpose
Of stirring the material ss 1t melts There are
openings in these tanks running into the mixing
pans The thorough stirring and mixing Of the
ssphaltum. sand and chemicals are effected by
heavy steam revolving rakeA Whom at the proper
temperature and consistency requisite amount OF
the material is fed into . pan about three inches
high. constructed that tho bottom can be
Withdrawn when directly over the mould. The
mate.isl thus released drops into the mould in an
oven layer.
The machinery for casting consists Of an iron
frame in two sections in which Is set a series OF
steel pins varying in number according to the
number OF holes required in the conduit. After the
mass of concrete has set sufficiently the pins are
drawn ont and the mould Is set In Q tank OF
running water to COOL When cooled it is taken ont
finished. tested and 10 then ready for putting
underground. The tull daily capacity Of the works
is now bstwoen p 600 and 1000 feet of six duct
conduit, such rs is now being made for BroOlykn.
The manholes are four feet six inches long. three
feet wide inside and as deep as may he required,
being bnilt up of concrete moulded in sections and
cemented together with the same material. The
top Of the manhole consists of q cast iron collar
sixteen inches deep.