One of the first scientific discoveries made with animals was William Harvey's observations about the circulatory system in the 1600's. In the 1700's Steven Hales was able to find a way of measuring blood pressure from horses. Animal experimentation began to become more common after its proven effectiveness and with many peoples acceptance of animal testing came just as many people against it. In 1865, Claude Bernard, considered the father of physiology and "prince of vivisection", wrote that "the science of life is a superb and dazzlingly lighted hall which may be reached only by passing through a long and ghastly kitchen." Bernard made animal testing part of the standard scientific method of the time. In 1876, the first animal protection law was put in place, The Cruelty to Animals Act.