Of the ions involved in the intricate workings of the heart, calcium is considered perhaps the most important. It is crucial to the very process that enables the chambers of the heart to contract and ...

The LP Survivor Series of disc-pack couplings from R+W America, Bensenville, Ill. (www.rw-america.com), transmit torque using friction. A series of bushings press the disc pack together. Precise ...

I was splitting wood one day a few years back, getting next winter’s firewood ready on my hydraulic splitter. It normally handled my ash and oak with ease, but I had a particularly gnarly piece of ...