1. Action of solvents on coals at lower temperature I — a qualitative survey of the effects of liquid upon bright coals of low rank;Dryden;Fuel,1951
2. Action of solvents on coals at lower temperature. II —mechanism of extraction of coals by specific solvents and the significance of quantitative measurements;Dryden;Fuel,1951
3. Action of solvents on coals at lower temperature III. —behavior of a typical range of British coals towards specific solvents;Dryden;Fuel,1951