“Den of a modular solar-heated house built near Corrales New Mexico, made of interconnected units of aluminum with a urethane foam core of insulation. Drums in the background are filled with water and retain the sun’s heat,” April, 1974.“Zome...
Category: Environment
Trends in US Coal Production
The U.S. coal economy underwent significant changes during the late twentieth century in terms of where and how coal was produced. Overall production increased after 1960 in eastern coal mines, with another jump occurring in western mines after 1970. Mining techniques...
“A Plan of Sundry Farms Est. at Patucket in the Town of Chelmsford” (1821)
Citation: University of Massachusetts Lowell, Center for Lowell History. Library Item Date:...
Solar Energy Innovations, 1970
“Den of a modular solar-heated house built near Corrales New Mexico, made of interconnected units of aluminum with a urethane foam core of insulation. Drums in the background are filled with water and retain the sun’s heat,” April, 1974.“Zome...
Trends in US Coal Production
The U.S. coal economy underwent significant changes during the late twentieth century in terms of where and how coal was produced. Overall production increased after 1960 in eastern coal mines, with another jump occurring in western mines after 1970. Mining techniques...
“A Plan of Sundry Farms Est. at Patucket in the Town of Chelmsford” (1821)
Citation: University of Massachusetts Lowell, Center for Lowell History. Library Item Date:...
Solar Energy Innovations, 1970
“Den of a modular solar-heated house built near Corrales New Mexico, made of interconnected units of aluminum with a urethane foam core of insulation. Drums in the background are filled with water and retain the sun’s heat,” April, 1974.“Zome...
Trends in US Coal Production
The U.S. coal economy underwent significant changes during the late twentieth century in terms of where and how coal was produced. Overall production increased after 1960 in eastern coal mines, with another jump occurring in western mines after 1970. Mining techniques...
“A Plan of Sundry Farms Est. at Patucket in the Town of Chelmsford” (1821)
Citation: University of Massachusetts Lowell, Center for Lowell History. Library Item Date:...