What is "Newland's law of octaves"?Why was the law discarded?

According to Newland's law of octaves, when elements are arranged in the order of increasing atomic mass, the properties of every eight element are a repetition of the properties of that starting element. Reason's for the discarding of law of octaves are: i)After the discovery of the noble gases, the idea of octaves failed. For example, the inert gases like helium and neon became the eighth element, thus, making the ninth and not the eighth element shown similar properties. ii) The classification failed with regard to the heavier element i.e. these lying beyond calcium. As more and more element were discovered, they could not be fitted into Newland's octaves