What was the "2nd Industrial Revolution?"

The 2nd Industrial Revolution took place between 1870-1914, in which new innovations and advancements of production and machinery in chemical, energy, material, and medical fields were implemented.  This second period used heavy industrial products and new sources of energy, oil and electric. Chemical fertilizers were used  to boost crop yields, while reapers merchandised harvesting. Inventions such as the cream separator and the refrigerator car made it easier for meat and dairy products to be transported, different from the first period of the revolution.