Evening star. [volume] (Washington, D.C.) 1854-1972, 1915-09-22
Illuminating Engineering So
ciety Hears Paper Read on
the Commercial Side.
ARC LAMP IS BELIEVED
OF HIGHEST EFFICIENCY
Papers Read at the Session To-day
Cover Number Of Technical
Subjects.

y
ing's commercial session Of the ninth
annual convention of the Illuminating
Engineering Society. which tomorrow
closes its sessions at the New Willard
Hotel. Commercial sessions and lab
oratory sessions are being held today
and will continue tomorrow.
The emphasis on service was laid
this morning by A. B. Spauldfng and
n. H. Potter In the course Of their
paper, How Can Gas and Electric
Companies Under One Management
Render the Best Light Service?" This
was the first paper of the morning.
1t was the opinion of Mr.. Spaulding
and Mr.. Potter that in order that gas
and electric company under one man
agement may give the best lighting
service, separate representatives who
are specialists in the application of
each lighting source should be employ
ed.
Company Should Aid Customer.
1.-THE company should lead the GUS
toner to an Intelligent appreciation Of
proper illumination and by the adop-
ton of maintenance service should
make him feel that the company is gen.
timely interested in his continued serv-
ice," 1t was stated in the paper.
There has been a radical change in
the methods and personnel of the SELL
ing force. Heretofore gas and cleo
tricity were the points Of discussion
with the consumer; but now illumina-
ton is the topic. Instead of so many
cubic feet of gas or watts Of energy.
illumination is being sold"
The customer must be educated to ap-
preciate the difference between proper
and improper lighting. in SO far as the
value Of proper lighting to his business Is
concerned, the paper declared.
Service does not necessarily mean the
reduction OF bills; 1t may and often does
result in an increase in the amount of
business with customers. Proper illumina-
factor in the discussion Of cost. not only
Of electricity and gas supplied. but Of fix
lures and first installation. Service,
therefore. means the providing Of the H.
Elimination best suited to each customer
at minimum cost" adds the paper.
"In the eastern section of the United
States there Is more good gas lighting
than electrical lighting" declared Thur
ston Owens, in the discussion Of the
paper following.
w. r. Moulton Of Baltimore. Mr..
French of Newark and others engaged
In the discussion. Mr. Moulton declared
that in leaving the customer to decide
whether he shall have electric or gas
lighting installed in his home or place
Of business put pretty big load on
the customers shoulders.
Efficiency Of Arc Light Praised.
The question Of the relative value and
place Of the arc light and the incan-
descent light was discussed by DR..
Charles P. Steinmetz. consulting en-
sineer of the General Electric Com
trical experts in the country, at the
street lighting session of the conven-
ton held last night. DR.. Steinmetz is
president-elect of the Illuminating
Engineering Society. and with the close
of the convention tomorrow automat-
ically becomes president of the body.
'The arc light has possibilities the
incandescent light does not have" de-
clared DR.. ,Steinmetz. The possibili.
no theoretical limit to the efficiency OF
the arc. Therefore it is probable that
the arc will remain the illuminant OF
highest efficiency. The Importance OF
convenience and fexibility of use~
Other papers read at this morning.
commercial session were: THE Selec.
ton of a Standard Unit Of Commercial
Lighting" by w. r. Moulton; SINAI
Incandescent Lamps and Special IL
rows, and "The Flame Pilot Ignition o.
Incandescent Gas Lamps" by C. W
Jordan.
The laboratory session heard the fol
lowing papers this morning: THE Eff
feet Of Variation of Atmospheric Pres
| sure on the Candlepower of variou.
Flames" by E. B. Rosa. E. c. Critten,
den and A. H. Taylor; Life Testing o.
Incandescent Lamps at the Bureau o.
Standards" by G. W. Middlekauff, B
Mulligan and j. r. Skogland; THE Ap
plication of Crova's Method of Colorel
Light Photography to Modern Incan
| descent Illumnants." by H. E. Ives ant
f. F. Kingsbury, and 1.-THE Relatiy,
Photographic and Visual Eficiencies O
Light Sources" by L. A. Jones, NJ. Il
Hodgson and Kenneth Huse.