hour, much less eighty miles an hour. On the London and Brighton line
Mr. Stroudley uses with success coupled leading wheels of large
diameter on his express engines, and we imagine that M. Estrade's
engine will get round corners safely enough, but it is not the right
kind of machine for eighty miles an hour, and so he will find out as
soon as a trial is made. The experiment is, however, a notable
experiment, and M. Estrade has our best wishes for his success.--_The
Engineer._

* * * * *




CONCRETE.[1]

[Footnote 1: Read July 5, 1887, before the Western Society of
Engineers.]

By JOHN LUNDIE.


The subject of cement and concrete has been so well treated of in
engineering literature, that to give an extended paper on the subject
would be but the collection and reiteration of platitudes familiar to
every engineer who has been engaged on foundation works of any
magnitude. It shall therefore be the object of this communication to
place before the society several notes, stated briefly and to the
point, rather as a basis for discussion than as an attempt at an
exhaustive treatment of the subject.