Have you herd of kelvins water drop experiment? Very interesting experiment involving water dropping through cans to produce a high voltage spark. There are some videos on such on you-tube, and alot of info on google about such. Basically there is two streams of water dripping through two cans, with the top and bottom off them. Then under that there is a can to catch each of the two streams of drips. Each top loop is connected by a wire to the opposite bottom can. the two bottom cans develop separate charges, one can being positive water, the other being negative water. With a wire from each bottom can close to each other a spark shoots across every say 20 seconds. From what I read these machines must be made right to work, but once they are made correctly they work every time. So since alkaline water is simply negative charged water, having extra electrons. Then by the kelvin water drop experiment, one of the cans will be this negatively charged water, and can be drunk as negatively charged alkaline water, said to be good for health and to help prevent free radicals. Of course its also possible one could just use a battery and something similar to this design to make alkaline water. So there you have it, a natures, natural way to make alkaline water. Now I wonder if Lord kelvin who invented the water drop experiment in (1867) used this machine for this purpose, but perhaps it was never put in the records. One has to wonder, the average lifespan for the 1800`s was around 37 years so I read. But Lord kelvin lived to be 83 years of age, he was born in 1824. Its an interesting thought either way!  Here is a link to the kelvin water dropper with a bit of info http://en.wikipedia.org/wiki/Kelvin_water_dropper

You know on second thought, not only could Lord Kelvin have used this to make negatively charged water, but the electrostatic zap between the two cans would most likely, when the experiment had finished, killed any germs/microbes in the water as well making it safer to drink. Just another random thought, but you never know!