Newton's Law of cooling Universal Set of two units , each with double walled jointless brass vessel and a non-conducting cover. A copper calorimeter 3"x2" hangs inside the brass vessel. The two vessels are joint by metallic T tubes and rubber coil. Provided with stirrer and a holed cork for thermometer.Newton's Law of cooling Universal Set of two units , each with double walled jointless brass vessel and a non-conducting cover. A copper calorimeter 3"x2" hangs inside the brass vessel. The two vessels are joint by metallic T tubes and rubber coil. Provided with stirrer and a holed cork for thermometer.