The manufacture of Portland Cement

In dealing with the manufacture of Portland cement as we find it to-day, in such a short space of time as is allowed me for reading this paper, my remarks must necessarily be brief and practical to confine the subject, and so I propose at once to take more particularly the methods adopted in this country, although I must mention the progress that has been made in recent years in the industry as we have found it in Europe and the United States and Canada.