Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 35
These bits are recommended by those who have used them as being one of the best arrangements for matchinglumber extant. Besides being more convenient to set than the common matching bits, they cut a smooth tongueand groove and do not heat. The instant the cut is made the bit is clear of the stufl:.…
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