Marijuana withdrawal can be more intense than people sometimes realize. While heavy, chronic users may begin to exhibit signs of depression, many users experience insomnia, anxiousness, and irritability.
A New Era. Although diesel locomotives first came to American railroads in the 1920s, their use was confined to switch engines, and later to passenger train locomotives. It wasn't until 1940 that the Electro Motive Division of General Motors (EMD) demonstrated that diesels could practically replace steam locomotives in heavy-duty service.
By the middle of the 1930's a new type of locomotive was beginning to appear on American Railways. This new locomotive used a Diesel generator to create electricity which powered axle-mounted electric motors. The original diesel engine was patented by its German inventor, Dr. Rudolph Diesel, in 1892.