Final answer:
Thomas Edison installed light bulbs by screwing them into the light fixtures and connecting them to the electrical wiring as part of a larger electric system including safety and control devices.
Step-by-step explanation:
How Thomas Edison installed light bulbs in J.P. Morgan's house is indicative of the practices of the time when electric light was being introduced to homes. Edison's approach to installing lighting in residential settings typically included screwing the bulbs into light fixtures and connecting them to the electrical wiring. This was part of a broader system of electric infrastructure that included dynamos, wiring, and various safety and control devices crucial for the practical use of electric lights, as opposed to using adhesives or merely placing them in decorative lampshades without proper connectivity.
The correct answer to the provided question on how Edison installed light bulbs in Morgan's house is by screwing them into the light fixtures (1) and connecting them to the electrical wiring (2). The process required a comprehensive system that not only included the bulbs themselves but also a network of power generation and distribution, safety mechanisms like fuses, and control devices such as switches.