It is perhaps, scarcely realised, except by those who, like the author, have, s0 to speak, their finger on the pulse of the cement industry, what enormous improvements have taken place recently in the quality of Portland Cement, all over the world; and this, altogether apart from the introduction and evolution during the past four or five years, of Rapid Hardening Portland Cement, a development which the author proposes to discuss later.
D.B. Butler