/
so. 000,000
/
10.000,000
CAST
PAS ADO A 4
PINtJC
/
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<S '.9M IttS IMO |«06 1>U Kli 1970 192S 1990 19U 1940
Patadcna, California, "Annual Report of the City ManaRrr. 1036-37." SCALE .8
Assessed Valuation of the City of Pasadena Fronn 1887 to 1936.
The inclusion of the notations about the annexes aids in reading this chart, since some explanation for sudden rises and falls is needed.
CURVE CHARTS
Excess Reserves of New York City Central Reserve Banks Fronn 1934 to September 1937.
This chart presents weekly averages of daily figures.
Federal Reserve Bnnk of New York. "Monthly Review," October 1, 1937. SCALE .6
-Improved carbon filament lamp costing $1.60
Squirted ] tungsten { ♦ straight -- Drawn tungsten vwire ■ -- filament straight filament vacuum vacuum
Ho\u research on lamps has reduced the cost of electric lighting .This chart is based on the lumens of light produced by nevu eOviJatt bulbs per \uatt of electricity consumed.
Da fa furnished by Wtstinghouit Elecfric Mfg Co
Draiwi tungsten Drawn tungsten -- -- wire re
\wire coiled filament gas filled
Average cost of lamp 75(t
Due to greater manufacturing precision
Due to research
Ol I I I ' ' ^ ' I I I I I I I I '
J I I I'll
-- -- -- -- -- oldr^ccJ
CM •* vD ao »0 ro Kl to
0> <J> O o>
Product Engineering. October 1938. Part of an Editorial on Public Relations Entitled "Research in America -- the Key to Belter Living "