51, where they are sawn up, counted as sawn, bound in bundles of 100, trimmed to exactly 4' in length and sent off to be stored.

The shingle bolts are picked off the moving platforms by men or boys, and sent to the shingle-machine, Fig.

52, where they are sawn into shingles and dropped down-stairs to be packed.

Shingle-bolts are also made from crooked or otherwise imperfect logs.
Of what is left, a good part goes into the grinder or "hog," Fig.

53, which chews up all sorts of refuse into small chips suitable for fuel to supplement the sawdust if necessary.