Geeze, Ed ! Thanx for the information; esp. the research timeline. My curiosity re. lard oil comes
from reading old books and articles. Its use was apparently de rigueur in the old days. I have not
found any modern definitions of the term, except for yours. Personally, it is more of a historical
curiosity with me. I generally use Tap Matic for turning and the Black Sufphurized mess for
threading.
Bob Swinney

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