To pursue a higher standard OT lIvIng We don't use our energy Figure 1.4 Horsepower per resources as efficiently as capita of all prime movers in the we could US Since 1850 The combustion of a single pound of coal, supposing it to take place in minute, is equivalent to the work of three hundred horses: and Nonautomotive the force set free in the burning of 300 pounds of coal is equivalent 0.38 to the work of an able-bodied man for a lifetime quote from an early physics textbook 1850 1870 1910 1950 1970 2010We don’t use our energy resources as efficiently as we could. To pursue a higher standard of living Figure 1.4 Horsepower per capita of all prime movers in the US since 1850.. 0.38 The combustion of a single pound of coal, supposing it to take place in minute, is equivalent to the work of three hundred horses; and the force set free in the burning of 300 pounds of coal is equivalent to the work of an able-bodied man for a lifetime. - quote from an early physics textbook