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How many ways are there to dry your hands?
That's the question photographer Samuel Ryde is trying to answer in his book, appropriately titled Hand Dryers. It's filled with photos of different types of hand drying apparatus from all over the world. Ryde believes that each hand dryer is unique with its own story to tell, which is why he decided to photograph hundreds of them.
The book's dryers are from around the globe, but here are some London specific ones.