Alex Lewis has spent many evenings searching for and gathering 100 rocks. After collecting various shapes and sizes from the west coast of Scotland, he returns home, numbers each from one to 100, weighs them, and measures their width and thickness. He’s looking for stones that fit comfortably in his palm, are heavy and light, and vary from circular to square. He then records all his data in a little black book full of tables and near indecipherable calculations. “I created something called the WH formula where I divide width…
