Continental drift Permian era but failing to account for glaciation in India, Australia and South Africa. Geophysicist Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including those he set up in the South Pacific. It is now known that there are two kinds of crust: continental crust and oceanic crust. Continental crust is inherently lighter and its composition is different from oceanic crust, but both kinds reside above a much deeper "plastic" mantle. Oceanic crust
A Discourse on the Study of the Law of study at a University. He was particularly alarmed by the growing practice of sending a potential lawyer to work in an attorney's office, saying that: In Continental Europe and Scotland, the academic study of the law was regarded as a required part of a gentleman's training, but it was not in England; the aristocracy "have been more remarkably deficient than those of all Europe". This was because the "stylistic barbarisms and crafty practitioners" were seen as below the aristocracy, and not conforming to gentleman-like sensibilities. Blackstone also emphasised the need for gentlemen to study not only the law, but