Wooden Spokes on a Tandem Axle

As Jim & I explored one of the trails at Red Rock, I came across this bit of old west technology disintegrating in the Arizona weather. Finding old wooden spoked wheels isn't too uncommon, but this one had four wheels on the axle instead of the typical two.

It would be interesting to know what it was used for when it was in service.

You have to love that incredible depth of field afforded by truely wide angle lenses!

Canon 20D - 1/30th second, 10mm @ f/ 9.5, ISO 100