[Illustration]
Patented October 30th, 1883.
This cut fairly illustrates our improvement. The corrugations at the
side keep the edges rigid, and prevent the edges from _dipping_ into any
space that may be between the roof boards where they are not laid close.
Besides this, they dispense with the necessity of chalk lines, and hold
the shingle or slate from lying close upon the metal, preventing decay
both of wood and metal. A convenience and benefit to every builder.
_To be used where the pitch of the roof is equal to that necessary in
using the ordinary shingle._
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[Illustration: _Design_ G.—_Front Elevation._