Evening journal., 1917-12-31

experience ln the summer OF 1916 de-
monstrated that the electric current
used during the period Of daylight saw
ing was reduced by percentages that
ranged from ia to 55. and the
amount Of gas used was reduced by
pc Centayes as low as but as high as
26 The figures do not include the saw
lngs in coal which would be obtained
at isolated plants and at the plants
OF electric railways which sell power
for lighting. Again, the est Innate has
been made on a basis which assumes
that the use Of electric energy and
gas for lighting is spread evenly over
the country, whereas as a matter OF
fact the Census Report for 1912 showed
that out OF a total Of 100000 incan-
descent lights wired for service by
municipal' and commercial central sta
tlons, 100000 were In the New Eng
land. Middle Atlantic, and North Cen
trail States-in other words. were In the
part Of the country where, because Of
latitude, the advantages Of daylight
saving will be most striking.
The estimate for The results II day
light saving is used throughout the
year is especially conser, atiye, since
II includes no innate for the saving
which would result throughout two
winter months when, In effect, a morn
Ing hour with very moderate use Of
artificial light would be substituted
for an evening hour Of maximum ar
tinclal illuminatlon. The saving Of coal
obtained in this way, cannot be es-
tlmated very accurately but It appsr-
emily would exceed 100000 tons.
Indirect Saving.
The saving Of coal through substi-
tuition Of a morning hour Of moderate
artificial Illumination for an evening
hour Of maximum use Of electricity
and gas for lshts Illustrates ways In
which very important savings In coal
would be obtained.
Reduction Of the peak load for CEN
t-sl POWER stations would have very
important results. To Illustrate the
Importance OF this item the situation
OF the Commonwealth Edison Co. of
Chica~o. which distributes approxi-
mately one-elghteenth OF the country's
total electric energy, may be taken
Tho neak load Of this company Is
needed for no more than one and one
half hours a day The average load
a. less than 80 per cent OF the peak.
The investment in equipment 10 pro-
dnce the neak Is upward OF one-fourth
Of The whole and equals at least s25,-
000 O00 the cost OF carrying this equip
mont Is 81 25100O a year AZ Rochester.
n Y, One-third Of the investment Is
said to be necessary to care for the
peak. at a cost per customer per year
NJ SEQ Daylight saving would fatten
he peak, since at the seasons when
he yearly peak is now attained be
'anse the greatest demand for electric
transportation and the maximum use
" electric light come at the same
iourl. daylight saving would reduce
he requirements Of power for lighting
md would at the same time place the
yreatest demand for electric trans.
lortatlon farther within the hours OF
latural light; In other words, daylight
aying would tend TO separate the two
actors the concurrence Of which now
auses great investment and large use
u coal, and at the same time would
materially reduce one OF those fac
ors. The benefits would be twofold:
A. saving OF coal in an amount which {
annOt be accurately estimated but
which would reach into the hundreds
# thousands Of tons, and (2) post
lonement Of new investments in equip
nent to carry the peak Of the load.
This postponement OF new invest
nents will occur at time when 1t is