Higher steam pressures or pulverized coal

Philip Torchio: I would like to ask Mr. Scheffler why contrast higher steam pressures against pulverized coal. Why not both? What is inconsistent between the two? The pulverized coal situation as affecting large cities is mostly a question of improving means to handle the ashes that come from the stacks. Until that problem has been definitely solved, it would be practically inadvisable to attempt, in a densely populated district, to install on a very large scale a system of coal burning that would scatter a considerable amount of ashes in the territory surrounding the station.