which was at first much complained of was owing to incomplete
construction, and not to any defect in the principle, or in the manner
in which it has been carried out.
[6] About three hundred planks were passed through the machine in a
working-day of ten hours, allowing the necessary stoppages for
sharpening the cutters; and if only three widths of sash-bar were
produced out of each blank, the quantity finished per diem would amount
to about two miles and three quarters. This machinery, as well as that
for grooving and moulding the ridges, was worked at the Phoenix
Saw-mills, Cumberland-basin, Regent's Park, belonging to Mr. Birch.
[7] A This piece of machinery is only novel in its application, as it is
similar to that used by brush-makers for drilling a number of small
holes in close and regular arrangement.