IN an article entitled “Base Exchange and the Formation of Coal” (NATURE, Sept. 24,. 1927) I discussed the probable influence of base exchange between the roofs of coal seams and sodium chloride ...

Russell McLendon is a science writer with expertise in the natural environment, humans, and wildlife. He holds degrees in journalism and environmental anthropology. In the tropical swamps of ancient ...

The current geochemical view is that hydrocarbons generated from organic matter disseminated in fine-grained sedimentary rocks and coals are controlled primarily by temperature and duration of heating ...

IN the course of some exploratory experiments carried out eighteen months ago when I was a member of the staff of the British Coal Utilisation Research Association, it was observed that appreciable ...