Appendix D: Estimated Primary Energy Consumption in the United States, Selected Years, 1635-1945.

The document titled "Appendix D: Estimated Primary Energy Consumption in the United States, Selected Years, 1635-1945" provides estimates of energy consumption in the United States during this time period. The estimates cover various energy sources such as wood, coal, natural gas, petroleum, and conventional hydroelectric power. The geographic coverage of these estimates expanded over time, following settlement patterns rather than formal statehood. For example, the wood data series includes 12 of the original colonies, as well as Maine, Vermont, and the area that would become the District of Columbia. The coal data series includes consumption in significant coal-producing regions that had not yet achieved statehood. The coverage for natural gas, petroleum, and conventional hydroelectric power includes all 48 contiguous states, the District of Columbia, and Alaska by 1885. [Extracted from the article]

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