The San Francisco call., 1909-04-20
ELECTRICAL RESOURCES OF
STATE ALMOST UNLIMITED
SUPPLY STORES DO
THRIVING BUSINESS
Every Electrical COntrivance
May Be Purchased Cheaply
From Local Dealers

III HE business Of supplying electri-
cal energy for San Francisco has
assumed enormous proportions. The
transmission of electrical power from
the swift streams Of the mountains has
facilitated the building Of electrical
roads and has stimulated countless
other industries that depend on cleo
/: tricity for their motive power.
The electrical shops of San Francisco
have for sale every variety of machine,
instrument and cOntriYance 10 which
the electrical motive power is applied.
These shops do great business, and
their proprietors are men of sound
technical education. capable OF meet
Ing any mechanical demand which is
made upon them.
Attention should be called 10 the
marvellous possibilities for the genera
ton Of electric power which have been
so far untouched in parts Of California
which are naturally tributary 10 San
Francisco.
There are probably more resources Of
power in the mountains OF California
than in any other state OF the union.
Electrical engineers say il has been es-
timated that the utilization of all the
power between Mount Shasta and Te-
hachapi, a distance OF 600 miles, VIII
produce 100000 horsepower Of cleo
trio energy. equivalent 10 p little over
1000 600 tons Of coal annually. and
worth easily s20O a horsepower This
means $1,000, 600 900.
Today the electrical engineers state
about $4,000 600 are invested in cleo
trio transmission plants All told,
about $4,000 electric horsepower is be-
ing used in San rancisco and the
northern California towns for light and
power purposes. Electric roads use
great part Of this power
All the large electrical supply houses
OF the country have extensive branches
in san Francisco. and in addition TO
these are a large number Of local firms
whose business is constantly expand
ing.
The inventor and the manufacturer
are constantly at work. adding new
wonders TO the list OF electrical con-
triEances and the San Francisco cleo
fricaI supply houses keep strictly
abreast OF the times Among other
supplies are TO be found an abundance
OF all the latest Improvements OF the
electric light.
Two methods by which electricity
may afford heat are illustrated in or
binary electric lighting An Edison
lamp has hlament Of carbon which
SO resists current as TO rise TO a
vivid glow A second mode is shown
IN an arc lamp whose two carbon pen
ellis FIRST touch then withdraw. leaving
between them an arc OF dazzling radi-
snce. An incandescent lamp, Of course,
demands a vacuum Today the best
lamp Of this kind has a thread Of tung-
sren Of an efficiency two and naf
times greater than that OF a carbon.
Tungsten may safely reach 1880 de-
grees Centigrade, while carbon may
not surpass $50 degrees. All OF these
lamps may be found in the electrical
stores of san Francisco.
There are all sorts of electrical con-
trivances designed TO increase the COM
forts Of home and to Tighten the bur
den Of the busy housewife. For the
kitchen there are coffee percolators
fr-z-ing kettles. waffle irons. all heated
Al small cost For the laundry there
is smoothing iron, always at the
right temperature and needing no re-
npsvass Of heat from the stove Nari-
eries Of motors operate clothes wash
ers. wringers. sewing machines, dish
washers buffers 10 polish silver and
vacuum cleaners for carpets and rugs.
There are fan motors 10 blow CRATE
ftl breezes when the summer air is
stnl and hot II is rather difficult
10 imagine any sort Of manual toll
which can not be performed nowadays
by electrical machines which are TO be
found in the shops OF San Francisco.
No san Franciscan desirous of pur-
chasing the latest electrical contri-
vance need go outside OF this city to
get what he requires. Every demand
can be met; in fact. many electrical
inventions have been first put upon
the market in this city.