filament lamp वाक्य

There, inside one of the many lamp cases on display at the Edison exhibit of the General Electric Company were displayed two of the " tar putty " carbon filament lamps made by John W . Howell for the 1890 trial, as well as the tools used by Howell to make said lamps.
The reputation of Franklin Pope and his article in " The Electrical Engineer " is the reason for the existing view in some countries that Henry Goebel developed a carbon filament lamp many years before Thomas Edison did it . " The Electrical Engineer " is available in the libraries of many technical universities.