The evening telegraph. [volume] (Philadelphia [Pa.]) 1864-1918, 1866-11-21

less that is generally Conceded bv pas en- ,inesrs
IMenees M 70 hye per cent, and that CONDEMNATION is
Sauseu oy tDe state OF the atmosphere, more pro-
IeIly belongs TO hat you have been talking about
as 10 the loss Of gas after it has been manu-
i"YYiiuLeu, ana not TO the Gas in the retorts.
| Upon lhis subject have no doubt that great
OF the loss in all cases is due TO condensation
uut am sure that condensation does not occur on
55eCouht OF cloudy weather. That has nothing 70
90 with IT, It would have very little to do with
neNen on the surf of the ground. Il would
They might we'll say that the state of the moon
would have something to do with II, as TO State
mat being clear or cloudy would. I think great
deal OF 1t is due to the condensation of gae where
sufficient care has not been taken TO have 10 cleared
from yapors before 1t is used Gas is combined
with large quantity of combustible vapor, the
whole passes through the meter, and the meter
makes no distinction between this vRpor or any
other Kind of gas When the gas goes under the
ground it meets different temperature from that
in which the gas has been combined, and this va
por is deposited The object of the gas maker is to
take as much of this vapor out OF the gas possl-
Bile before the gas passes from the purifying houses
through the meter.
There is another point which NAV be of interest
in regard to meters. The man in charge of a gas
monufe ctoTy, who is in competition with other
men IN charge of other gas factories, naturally
wants 10 make mis- own look as well as possible,
and he may keep his register full of water that
1T will register more than it would If 1t contained
the proper amount of water, and his meter will
run faster and measure more gas than II would the
other Way. When the gas comes to be used by gas
meters tbat are set right it would not show SO
much, and this may have caused the loss When
was stationed at the gas works had to watch our
station meters 10 see that they were set right and
did rot register more than the actual quantity of
gas m ade
Colonel Page-Is the dark weather indicated by
the hours Of burning public lamps greater than
Mr., Cresson-No 1 should think not They have
2644 OF actual lighting. The records of the gas
three thousand hours. They have 1887 hours,
which is too little. The public cannot be accom-
modated with that.
Col. Page-How much of the loss OF gas in '65 be-
yond that of 63 may be attributed to all the causes
you have enumeratedl
Mr.. Oresson-1f you take all the causes l have
enumerated-I have put in reason for condensa-
ton that has not been given there-if you take the
causes as they are rated here the Condensation
caused by cloudy weather and add that to the area
of the street main and the loss by the gas holder,
not a tenth part of the excess. The condensation
that is caused naturally does not vary one year
from the other. The temperature does not vary in
amain between any given month of the year and
the same month of the next year two degrees. 1t
varies of course that much between winter aud
summer, but take the month OF November, for in
find difference of two per cent. between year
and another. The other cause may have been that
the station meters were not properly regulated or
the gas was not properly cleansed in its manufac-
tuTe.
Colonel Page-Is there any difficulty in deter
mining the difference of consumption of burners
under the different pressures nemed, inches and
3 inchesl There is no answer given to this ques-
tion which put to the trustees.
Mr.. Cresson-No. The question asks what
would be the difference in consumption of gas of a
feet burner, as required for the street lambs, be-
pressl re per hour, and also between inch ana la
X inch.
1t is one of the simplest things in physical
science to make that calculation. The amount of
gas cC med is exactly in the proportion of the
square roos of the pressure; and, Therefore, under
these circumstances, with the same burner the
quantities of the gas consumed would be as the
square root of the three TO the square root of two
in the one case The six-foot burner would be re-
duced to q hve-foot burner under two-inch pres
sure; the burner burning six feet of gas under
three-inch pressure will burn five feet under two
m W ~ "a ON Hn
Colonel Page-Would the answer given to
accou mt for the deficiency of coke for the quantity
of cca carbonized in 1865 be reasonable and sats-
factory! or would not the true reason be that the
gas not all being distilled from the COAL it pro-
duced coke of a bad quality, and not sufficiently
burn ed, so that IL would readily so to pieces in
handlingS
Mr.. Cresson-This answer says that coke, when
exposed to the weather, breaks and think that
what Mr.. Jones says is sufficient to account for
in large bulk in bad weather, lose more If the
case given here and Mr.. Jones' figures of the
amo unit on hand be correct, they will account for
the oss.
Colonel Page-But the other will enter into the
loss
Mr.. Oresson-Of course, If the coke is not we'll
buI ned, it is frable, and breaks down easily. For
instance, If you open q retort that has been fired
two hours the coke Is soft, and will break up in
your fingers. This would produce a similar effect
The amount of loss in 1865 was about six per cent
ter would destroy some of the coke especially if a
large stock lay over all winter, and would pro-
baby amount to as much as six per cent increase.
Colonel Page-I do not ask anything about the
management of the works. have only asked you
scientific questions, which, not being scientific
man myself, know nothing about, and don't wish
to ask you any questions about the management of
the works which, from your own connection with
them, itmight be delicate for you to answer
To get at the deficiency in the yield of COKE Col.
Page made the following statement: