Continental drift plate tectonics theory. In particular, the English geologist Arthur Holmes proposed in 1920 that plate junctions might lie beneath the sea, and in 1928 that convection currents within the mantle might be the driving force. Holmes' views were particularly influential: in his bestselling textbook, "Principles of Physical Geology," he included a chapter on continental drift, proposing that Earth's mantle contained convection cells which dissipated radioactive heat and moved the crust at the surface. Holmes' proposal resolved the phase disequilibrium objection (the underlying fluid was kept from solidifying by radioactive heating from the core). However, scientific communication in the '30 and
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