The Scranton tribune. [volume] (Scranton, Pa.) 1891-1910, 1899-03-30

cal expert appointed to investigate ana
report on the quality of light being
furnished the city, made his report to
Mayor Bailey yesterday. The con-
tract calls for 1000 candle-powCr. but
Expert Spain says there is not n light
in the city of that capacity and that
the average Is 25 to so per cent. below
that. The report reads as follows:
Scranton, Pa. March 90, 1NH9.
Jaincs G.. Bailey, Mayor and Sotcct and
Common Councils, Scranton, Ia.
Gentlemen: This report is respectfully
submitted in compliance with your con-
cure mt resolution as follows. approved
| February 3, 1899.
"RCSoVed, BY the select council of the
city of Scranton, the common council
cJncurring. that the mayor be and he Is
hereby authorized to engage an expert
| and have the city electric lights furnished
| the city tested. showing their actual
CIndle-poWer and report to councils at
! the earliest date"
My commission issued by the mayor
ana authorizing me to do the work in
| dicated I'm the fore going was received
| March %, 1899.
! In making the tests Gid not select any
| particular locality or lamps, but NAL,
/ the tests in Green Ridge, Providence,
| the West Side. the South Side and in the
vicinity of the Moses Taylor hospital
! Owing to rainy and unfavorable weather
! ! was prevented from making tests In
| the business section OF the city on Tues
! day night of this week.
| have made a record, which L. inClua-
ed In this report. of the tests made. With
exceptions so few as to scarcely need
! mentioning, the lamps tested were of the
| average brillancy in the particular To-
| Cnlltics where the tests were made.
NOT ONE LAMP.
OF the sixteen tests made and recorded
| herewith, I failed to find one lamp Of an
| average 1000 candle power. With one eX.
ception they averaged from 25 to 30 pei
| cent less than the 1000 candle power
| mentioned The minimum candle power
| of three of the lamps tested was in each
| case more than 80 per cent less than 2,GpC
candle power, viz. Sanderson avenue and
| East Market street, Mylert avenue and
! Green Ridge street, PittStOn avenue ano
| Alder street
In some instances found that the MAX.
| imum amount of light furnished Wa,
| nearly if not quite 1000 candle power. but
| the average Of these particular lamps
was less than THAI owing To the increased
presence of minimum power as compared
| with the maximum. In considering this
| and other comments it must be taker
! into consideration that the tests were
| made direct from the lamp terminals
| but that the deposits of filth and carbon
/ in the globes decreased, of course, the
amount OF light to a point below the
! figures actually incorporated In this re-
port. Tho globes of all the lamps tested
| were very dirty.
| The majority of the lamps were ad.
| iusted over d very wide range of voltage
| In some cases the variation exceeded one,
| half the capacity of the lamps at thcil
| highest point. The variation in the volt
| age of a properly adjusted series arc lam
! seldom exceeds five volts, and is so ar.
ranged as to be the maximum voltage OF
| the lamp, the maximum being the rated
| capacity of the lamp. As the candle
power varies with the voltage 1t is I'M
peratvc that close adjustment be Ob
| served in order to obtain proper results
| As you will note in the attached detailed
| record of lamps tested this close adjust,
ment was entirely lacking. This fault to.
| gether with the general reduction of tn,
! voltage is responsible for the averag" low
| efficiency shown.
CONCESSIONS MADE.
In computing the candle power Of the
| lamps / have made two very important
| concessions in favor Of the system:
| u / have assumed that the average
| was $40, which is the standard anl
which. / believe, is claimed for the sNs
| TEN under discussion IN this report.
t9 j assumed that TIA" c2rbuns Were
| perfect.
Both of the above are very importart
! points ana II not as stated the caudl,
| power hereinafter mentioned would b'
| further reduced In proportion to a EiyCr
| lower amDeragc and acCordin6 t.
| the quality Of the "drboI,S. | had n,
| means of informing myself in these re,
| spects without interfering with the con
! struction of the system, but in The lh
sence of the information | have givcr
| the system the benefit of all doubt.
A comment. perhaps not wholly nee
| Cssary to this report Ibut Suggcst,d Il
nevertheless, by the absence of informa,
| tOn as to power AT a plant might prop
| rrly be made as follows for the infor
nation OF councils: As the rated capar
| ity of a series arc dynamo is in voltag,
| and ampcragc at given horse powcl
| ana speed, it makes no material differ
| ence in cost whether this electric energy
| Is distributed through ten lamps at tul
candle power or twenty lamps at hal
candle power In the expense of upcrat
| ing the ten or twenty lamps the only m
| crease for IN" latter would he for car
| buns.
Following is the result of the test,
made:
| SanderSon avenue and East Mark
| Street-Luwrst voltage, Il, G33 candle
! power; highest voltage, g, 1851 candl,
| power.
Dickson avenue ana East Market stree
! Lowest voltage. y, 1lS2 candle power
| highest voltage 80 l.3jS candle power
Sandcrson avenue and Delaware stree
/ Lowest voltage, So l.267 candle pOwcr
! highest voltage, IS, l,G0i candle power.
Green Ridge street and SandersOn ave
| nuc--LOwest voltage, ~, l,lS2 candle pow
/ er; highest voltage, 80. l,52O candle power
/ MYlcrt avenue ana Green Ridge street
/ CONTINUED on Page s.
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