Richmond dispatch. [volume] (Richmond, Va.) 1884-1903, 1886-08-04

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m following IRON the Cincinnati
Enouirsr affords evidence 10 addition
70 that already published that Hon.
mopd granite 10 the standard. Inc .ss's
siyen below differ from those described
+ shs Cincinnati Commsreial- Gazette In
that they we're hydraulic tests: /,
The physical test Of granite announced
BY Chief Engineer Stanley took place ~
No. s33 west Sixth street yesterday af.
ternoon, occupying about three hours
time. =,
The witnesses Of the test were Messrs.
Henry Lewis, Thomas G. Smith, and
Charles Jacob, Of the Board Of Public
Affairs: Chief. Engineer Stanley, As
sistsnt. Engineers Bosh and Trip. ex-
Chief. Engineer Dsnenhower William
Husssy ard Frank Kirchner, granite
contractors; Mr.. willis Tharp, civil
engineer; several expert workmen IT.
terested, and representatives oil the
press.
The test was made by Messrs. Por-
ter and Going, chemists and engineers,
the machine used being . fifty-thousand-
pound hydraulic press. Mr. Porter
turned the crank; William Going
handled the scale. The samples OF
granite were all cut in cubes OF about
two inches square. Each was placed
between two pieces of sheet-lead to in
sure uniformity Of pressure, and then
adjusted on the base Of the press, which
works noiselossly. As the crank is
turned the plates Of the press come to-
gether almost imperceptibly, but every
pound Of pressure is marked on the
besm Of the scale, which looks like a
Fairbanks scale exclusively. Pretty
soon the little cube is seen to "spall."
to split, to crack, and to crush or
crumble. Every one present could see
that the test was perfectly fair. 1t
could not be otherwise, as the register
of the hydraulic press tells no lies.
The test was made in the following
order:
Richmond samples, put in by Eugi-
neer Stanley.
l. Cracked and crushed at $4,000
pounds.
2. Spalled at $4,000, cracked and
crushed at 80, 100.
3. Cracked at $4,000, crushed at
As. 2SO.
Richmond sample, put in by N. j.
Ryan. Spalled at $3.50, cracked and
crushed at Is, GAO.
Marlborough IN. H. samples, put in
by Stanley.
/. spalled at 1850. cracked at
$1,000, crushed at 900.
2. Cracked ct 1920, crushed at
1880.
3. Put in by Frank Kirchner.
Cracked and crushed at 90, 100.
North Jay, Me. tput in by Stanley
Spalled and cracked at 16, $50, crushed
at 10000. No. 2 spalled and cracked
at l7,130, crushed at l9, l40.
Georgia samples put in by Stanley
No. cracked OF 1880, crushed at
90, 200. No. 2 spalled and cracked at
1850, crushed at Is, 800. No. spall-
ed at 1870, cracked at 1880, crush
ed at same pressure.
Georgia samples tput in by William
Hussey)-First cracked at 1920,
crushed at 1880. No. 2 spalled at
1900, cracked and crushed at 20,980.
This concluded the granite tests.
As wind-up to the exercises Engi-
neer Stanley put cube of well-season-
ed oak in the press--a two-inch-square
cube. 1t was practically cracked be-
fore going in to get squeezed, but the
tough little bit of timber did not crack
by pressure till the scale marked TO-
300. Then it spread and went to pieces
1T IL, $40.
The Engineer will submit the granite
figures to the Board Of Public Affairs
to-day. 1t then remains to be seen
what action the Board will take on Geor-
yia granite.