1 янв 1879 г. - Invention of Light Bulb

Описание:

The major economic impact of the light bulb was that it allowed factories and other businesses to run even in the night. This increased economic production dramatically.

It was the most important invention made by man. Help at work at night, allowed us to navigate and travel safely in the dark, that is, without the lamp there would be no life at night

Добавлено на ленту времени:

Дата:

Изображения: