The San Francisco call., 1899-06-22
ELECTRICIANS
TALK FLUENTLY
Of CURRENTS
Closing of the Annual
Convention.

The second day Of the annual conren-
tion OF the Pacific Coast Electric Trans
mission Associa ton. AZ the Cliff House,
was devoted TO the reading OF papers and
q general discussion. The session began
al 10 o'clock and ended late in the after
noon, the entire programme having been
completed according 70 schedule. Prince
Poniatowski directed the meeting in his
new capacity as president of the associa-
ton.
Professor c. l. Cory Of the University
Of California read a very carefully com
posed paper on the Regulation Of Alter
mating Current Generators He said:
The electric motive force produced IN
any given dynamo Is directly proportional
TO three facrors-the speed. or the number
Of revolutions per minute; the number
and arrangement OF conductors on the
armature. and the strength Of the mag
netic field in the space through which the
conductors are moved. AS is well known,
the conductors in which the electro mo-
tive force is produced are sometimes sta
tionary. in which case the magnetic field
is caused 10 move or TO change in
strength which is equivalent in every
way TO the movement of the conductors
when the magnetic field is stationary.
AS long as these three factors are con-
slant. the electro-motor force generated
Z
In conclusion. after an elaborate teca-
nicaI explanation Of his subject, Professor
Gerry said:
ut might be said that our modern
dynamo. whether alternating or direct
and If alternating. whether polyphase or
tant features-a high efficiency, a low
temperature increase when operating at
full load, good Communication (reference
! only TO direct current machines), COCA
l roI d.z=f
/ good regulation. These i've features are
/ interdependent and each has greater or
/ less importance.
paper an open discussion occupied the
time and attention of the association. The
! next paper was read by L. A: Hicks His
subject was electrically Driven Centrif-
ugal Pumps" He said:
'The drought OF the past two years in
California has been productive Of great
/ exDansion in the manufacture Of pumps
suitable for irrigation purposes and the
! contemporaneous development Of numer-
Gus projects for the electrical transmits
sion OF -water-power az such intensitiess
that distance comes TO be OF
decreasing Importance, is favorable
to the continued utilization OF
pumping as a means Of supplying water
for irrigated land insuring crops in dry
years and so maintaining land values and
load factors" The speaker then went
into a technical consideration Of centrif-
ugal pumps nd their value. After care
ful analysis Mr.. Hicks concluded with the
following:
THE application of this philosophy tc
/ the centrifugal pump leads TO the con-
cluson that a properly designed plant OF
this type in units up to 5GG0.600 gallons
capacity is economically superior to any
other possible installation. and that where
circumstances are favorable TO the use
of electricity the simplicity, compactness
and automatic regulation Of these plant:
are unexcelled. These considera tions must
in time make the centrifugal pump an in.
| creasingly important factor in water
works service"
". c. Hutton's paper, by What
Method Shall Be Determined Fair Re
turn for Current Supply favored a re
duction Of rates SO as TO increase con.
sumption.