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Paul bunyon coloring pages

Michael Edmonds states in his 2009 book Out of the Northwoods: The Many Lives of Paul Bunyan that Paul Bunyan stories circulated for at least thirty years before finding their way into print. In contrast to the lengthy narratives abundant in published material, Paul Bunyan “stories” when told in the lumbercamp bunkhouses were presented inRead more

Design of the day

Steam engines coloring pages

Steam-driven devices were known as early as the aeolipile in the first century AD, with a few other uses recorded in the 16th and 17th century. Thomas Savery’s dewatering pump used steam pressure operating directly on the water. The first commercially successful engine that could transmit continuous power to a machine was developed in 1712Read more