Another means to measure torque is to connect the engine to the dynamometer through a torque sensing coupling or torque transducer. A torque transducer provides an electrical signal that is proportional to the torque.
A common assumption to explain the cause of the American Civil War was that the North was no longer willing to tolerate slavery as being part of the fabric of US society and that the political power brokers in Washington were planning to abolish slavery throughout the Union.
One may argue that, since the cotton gin caused such an increase in slavery, the invention of the gin was a huge cause of the Civil War. Southerners were getting so wealthy off of the cotton industry that they were very adamant about keeping their slaves, leading to the slave states seceding when Abolitionists wanted to banish slavery (PBS).