The efficiency the bulb had been
greatly improved since 1879 but there was still long way to
go. Edison could only have experimented filaments the
winter months when the Ogden mill was closed down, but kept
up stream enthusiastic reports General Electric. Getting back work meant applying himself the problems
of commutator design, producing new meters and measuring
instruments, and most all, finding better filament for the
incandescent bulb." Edison did contine the work incandescent
filaments and fluorescent lamps, with average weekly
expenditure around $250— reduction the level of
c
expenditure the early part the decade. The central problem was improve the poor
efficiency bulb that converted most the current into
heat rather than light..VII- 2
GE. In
December 1896 wrote Fish have reached very
curious stage the lamp filament work.
The amount financial support from changed over time
as company and inventor negotiated the costs the
experiments.evidently have a
4
perfect filament. There are few other
details extant Edison's "perfect filament" and probably
remained experimental proposition rather than major
innovation.. The policy the
." The new agreement signed with 1896
gave Edison $1000 month pay for the experiments on
filaments and other electrical technology. Edison told 1897 that hope either
succeed the filament come understanding with you to
continue
