How to read a gas meter.
The index of an ordinary gas meter, which is similar to that
of an electric or a water meter, h shown in Fig. 41. The smal-
CU5IC
Flo. 41. — The index of a gas meter. Each dial
is nitirked with tho volume of gas passed a
revolution. The amaller top diiil, which ia
marked ''Two Fc*et** itmide of the circle, \&
gent?rally ciillcii the " testing circle '^ or '* prov*
• ing hezid*' and is used principally in testing
the miter.
ler top dialj which is marked ** Two feet " inside of the circie, is
generally called the '* testing circle" or '* proving head," and
is used principtilly in testing the meter. One revolution of
the hand of the ie^sting circle indicates that 2 cubic feet of gas
have passed through the meter* In some meters one revolu-
tion of the hand of the testing circle represents more or less
than 2 cubic feet of gas and the testing circles are correspond-
ingly market!. The indication of the hand of the testing circle
is ignored in the ordinary readincc of the meter.
Of the large dials the first one at the right is usually marked
'*1 thousand/' This means that during one complete revolu-
tion of the hand, 1000 cubic feet of gas has passecl through the
I
144 A AfANUAL OF HOME-MAKING
meter. This dial i^ divided into ten equal parts so that the pas-
sage of the hand over each part indicates the passage of one-
ten ih of lOOO cubic- feet, or lOi) cubic feet. For most meters,
it may be said of the other dials that the complete revolution
of each hand indicates the piissage of ten times as niuch gas as
one revolution of the hand of the dial of next lower denomina-
tion {usually the one to the right). The fij^ure representing
the numi)er of cubic feet discharged during one revolution of
the hand is written over e^ch dial. Thus if the first dial is
(T)
CUDIC (>) petT
13^ii^^ ol^iSti^rt J^^^^^^^
Fio. 42. — Gas meter index readiDR 79»500 cubic
* feet,
marked '* 1 thousand/* the second dial will Ik> marked " 10
thousand/* the third *' 1(X) thousand," and so on,
The reading of the index, as illustrated in Fig, 41 is as follows:
ReadiriR of *'l thousand'* dial. 204) tnhit* feet
Rcaditig of ** 10 thousand ' ' dial . 5 f)0O ** "
Heading of " 100 thousand'' dial 30 000 " "
Com plot e reading of the meter ;i5 200 ** **
It is not necessary to write down separately the reading of
each dial, but it is much sliorter to set down from ri^ht to left
the figure last passed by the hand of each dial, eomniencinpf
w^ith the dial of lowest denomination and then — if the dial of
lowest denomination is marked *' I thousand'* ^appending
two zeros to the resulting figures.
If a hand is very nearly over one of the figureis on a dial it
is impossible to tell without consulting the dial of next lower
HOUSEHOLD MEASUREMENTS AND THEIR USE
Page 81
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How to read a gas meter.
The index of an ordinary gas meter, which is similar to that
of an electric or a water meter, h shown in Fig. 41. The smal-
CU5IC
Flo. 41. — The index of a gas meter. Each dial
is nitirked with tho volume of gas passed a
revolution. The amaller top diiil, which ia
marked ''Two Fc*et** itmide of the circle, \&
gent?rally ciillcii the " testing circle '^ or '* prov*
• ing hezid*' and is used principally in testing
the miter.
ler top dialj which is marked ** Two feet " inside of the circie, is
generally called the '* testing circle" or '* proving head," and
is used principtilly in testing the meter. One revolution of
the hand of the ie^sting circle indicates that 2 cubic feet of gas
have passed through the meter* In some meters one revolu-
tion of the hand of the testing circle represents more or less
than 2 cubic feet of gas and the testing circles are correspond-
ingly market!. The indication of the hand of the testing circle
is ignored in the ordinary readincc of the meter.
Of the large dials the first one at the right is usually marked
'*1 thousand/' This means that during one complete revolu-
tion of the hand, 1000 cubic feet of gas has passecl through the
I
144 A AfANUAL OF HOME-MAKING
meter. This dial i^ divided into ten equal parts so that the pas-
sage of the hand over each part indicates the passage of one-
ten ih of lOOO cubic- feet, or lOi) cubic feet. For most meters,
it may be said of the other dials that the complete revolution
of each hand indicates the piissage of ten times as niuch gas as
one revolution of the hand of the dial of next lower denomina-
tion {usually the one to the right). The fij^ure representing
the numi)er of cubic feet discharged during one revolution of
the hand is written over e^ch dial. Thus if the first dial is
(T)
CUDIC (>) petT
13^ii^^ ol^iSti^rt J^^^^^^^
Fio. 42. — Gas meter index readiDR 79»500 cubic
* feet,
marked '* 1 thousand/* the second dial will Ik> marked " 10
thousand/* the third *' 1(X) thousand," and so on,
The reading of the index, as illustrated in Fig, 41 is as follows:
ReadiriR of *'l thousand'* dial. 204) tnhit* feet
Rcaditig of ** 10 thousand ' ' dial . 5 f)0O ** "
Heading of " 100 thousand'' dial 30 000 " "
Com plot e reading of the meter ;i5 200 ** **
It is not necessary to write down separately the reading of
each dial, but it is much sliorter to set down from ri^ht to left
the figure last passed by the hand of each dial, eomniencinpf
w^ith the dial of lowest denomination and then — if the dial of
lowest denomination is marked *' I thousand'* ^appending
two zeros to the resulting figures.
If a hand is very nearly over one of the figureis on a dial it
is impossible to tell without consulting the dial of next lower
HOUSEHOLD MEASUREMENTS AND THEIR USE