Here seemed to be a very promising field for an ingenious inventor, a field that is still “To Let.”

In the absence of any such inventive genius, the author has had certain ideas of his own embodied in the “Mark V” type of shuttering—a type that further experience and experiment will doubtless modify.

The principle of the building-process remains unaffected. The improvements, such as they are, are merely improvements of mechanism.

DIAGRAM OF MARK V PISÉ SHUTTERING
[Larger View]

Mark V Shuttering.
Showing top cross-braces thrown back and free leg disengaged.