New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1871-08-31

light In the Democratic party anu ~ s"iu y" 'O
tho treasurer OF OF its powerful associations He
heean life in this city clerk In hardware store lie
subsequently taken into the CRATE aud stove found
CIV of his brother J. Jackson at the corner OF Goerck
and siantonsts His brother after while started him
IN the foundery business with MI Throckmorton, In
Coerck.st He eventually bought out this partner
jackson was then taken into partnership by his brother
aud they have since done business at Twenty ighhst
and secondave. He is not practical mechanic
md cannot superintcnd his own works. He Is
oute dependent in this respect upon his more prac-
ucal and efficient brother He was member OF the old
Board Of Education According to all accounts he Is much
eated by his appointment Inspector He told our in
foraant that Nc Gregor had said to him that he "had
good thing" and he believed he had. Having worked
hard all his life without making anything he wanted
IN begin now He used nearly the same language to
another iron master and added that he thought that be
had got hold OF something now by which he could make
fortune" He certainly will make largely from his
foundery alone If his plans succeed Already j. L. Jack
son & Bro are for the first time crowded with work
for builders consider that If they want TO get their jobs
done quickly they mnst order their beams where there
will be no delay in the inspection.
one principal means employed by Mr.. Jackson toprove
the necessity Of such testing the new law demands,
and that he was the 10 do it, the publication of
An article in The Iron Age and The Scientific american
entitled Experiments the Strength Of Castlron
Girders" This article IA technical for thorough
examination in these columns; but brief and general
criticism upon it will place here. He states that he
has made series Of experiments which prove that the
old style OF testing large beams In accordance with GER
tain formula derived from the breaking Of small ones, is
Enthusiastically. He shows that Hodgknson beam that
ought to have borne 50 1920 tuns according to
the rules broke at so tuns; and again
that Farbarn beam that ought 10 have broken at A
tuns broke at He then gives elaborate explanations
OF the OF this discrepancy but sngulary enough
makes no attempt substantate his doctrine that the
IN, he done by of
experiments but simply tries TO show that his beams
were exceptional ones-that his Hodgkinson was prob
ably composed part Of soft Scotch pgiron, and the
FaTbaTn chad the advantage the other OF lying
20 hours longer IN the sand Consequently it
cooled slowly, and contraction more eQualized,
increasing its capabity TO resist strain. Lastly being
with the web downward all impurities would rise
upward 10 the bottom fange subject TO tension while
the Hodgkinson BEAM being cast on Its side the mpur
ties would rise &c the anges uppermOst" Apart from all
discussion Of theories how emneny absurd were these
experiments, when there attempt TO get beams
cast in the same way and of average materials! The
ironmasters consider this publication advertisement
and attempt to give scientific excuse for plunderiDg
them and the public.
THE TAX oPPREssEs.
The most impressive testimony concerning this matter
however that obtained from the ironmasters them
selves who have already felt the pressure of the law.
Here is some Of the experience OF A. j. Campbell Pres
dent OF the Architectural Iron Founders Associa
ton When received Mr. JacksOn's circular he went
20 him and said:
"Do you know what burden you putting upon
usi One job doing will cost Us $1,000 extra
for inspection. according TO your figures"
ooh no, not so much as that" said Jackson.
oven here my figures for one building The
columns of the first story u feet high, OF the second
1914 OF the pa of the fourth 49, and OF the fifth IS
total hight OF 81 feet As there IL columns each
floor there would he 1872 feet At 10 cents foot this
would give Sl,O55 40 for columns alone. The gndNTs
would cost $50 to 500 more"
This showing rather staggered the inspector ana ne
concluded that he would not test hut simply inspect
those pillars as the work was contracted for before the
law was passed and remarked, by way OF general pal
iat0n But we are all ID the same boat Mi. camp
supposed, he had machine for testing columns
have" So that builders and founders may expect to
have all columns well Orders under the hydros
tatic pressure and themselves under such
whether they shall do any business in future
Mr.. Campbell, in common with the other ironnasters
visited. rdcAed Mr.. Jaekson's publ tests. lie
said that The trade was not invited 10 these experiments,
and when Mr. Jackson was asked the reason Of this he
F 2G i4 s 9 Of sppn esp
with only six-nch bearing-at the very center of
weight that the beam required to carry must he
upon The ccner and If suSains that without per
whole weight that l. to be distributed over t. Mr..
Campbell does know how he arrives at this conclu-
eOD and has not met with anyone who does
THE OLD INSPECTIONS SUFFICIENT.
Another who was visited said that the old
inspections were all sufficient Whereas, Mr. Campbell
=, found fault with that provision Of the new law
Itch de hands the destruction Of beams that have been
tested and found wanting, this gentleman while pro-
claiming the hydrosatic test humbug and quite need
ss averred that the law right in causing the de-
strucon OF cast beams and grders that had received
a " nermauent set" bend from the test, as TINS set
showed that the strained He insisted thaty you
cannot find the actual safey-weight OF beams OF any
given size without breaking one OF them. Ihls
hal in
beams " the Parliament House in London This
was feasible and cheap ana the true metnod
enough any practical and scientific ron.mastei
thOuld De able TO test ms beams snclenty Dy Tue oiu
formula. The fact is that no such weight ever comes on
fts suppositon is that ali the brick lying
above grder press directly down upon NJ whereas on
account of the power Of the mortar the main part OF the
weight goes the two ends OF the order or lhe aDnt
ments An architect present stated that only the mass
OF mason work lying Immediately over the grder and
contaned in an eGuatera triangle OF which the glrder
is the base will usually tai out Wneh inc gnuef Is taken
This founder had a complaint against superintendent
McGregor for alleging In OF his reports that II was
thinner than the ends II this indeed the case there
would be cause hyrosac tests but the fact was that
columns are usually sold by weight anu the founders are
only too anxious to make them thick and heavy Cor
inthian columns, which have thick, ornamental Da7e
According this gentleman there IS wedenned pan
70 give Iaany ne i eIR tee ot be STese in other
than the hydrostatic FORM He bad also heard lhat
McGregor had an interest IN the business % o. ~ Inn
Joint stock company 10 do all the W9rk Oh tne ci!
much hold a. and the appointment Of Jackson is the first
step to ard forming the proposed company
MORE COMPLAINTS.
The President OF very extensive fOuDdery company In
this line fully agreed with all the objections raised
AGAINST the new law and its administrator. He men,
toned another evil result of this testing AS contractors
they are under penalties, and have often 70 work day
and night II waiting for tests makes them behind time
with their work they forfeit their penalties TINS con;