Wooden Trough Planter Why Do They Have Troughs Close To The Floor Along The Bar In Old Taverns?

Why do they have troughs close to the floor along the bar in old taverns? - wooden trough planter

Do you know where you would normally their feet on a survey made of brass or wooden step at the bottom of the rod. Well, I saw two different bars with a river. I asked people who work there, but said they had no idea. He was there when they bought the place.