Chapter XIII: Part IV

Filing and Setting Hand-Saws.—The Qualities Required to make a Good
Filer.—Rules in some Old-time Joiner Shops.—Careless Filing and its
Consequences.—Clamping Saws for Filing.—The Line of Teeth.—Angular
Groove on Cutting Edge of Saw.—Filing Backs of Teeth.—Jointing
the Sides of Teeth.—Shape of Teeth for Cross-cutting Hard Wood,
Medium and Soft Wood.—Cutting Angles Required for Various Degrees
of Hardness in Woods.—Angle to Hold the File—The True Theory
of Saw-Filing.—Buckling and Twisting Saws; How Done and How
Avoided.—“Hook and Pitch.”—Careless Use of Saws, and the Injuries
Done to them in Consequence.—The Filing of Different Saws, and
why One Class of Saws Require Different Treatment from Another.
The Saw that Scrapes, and the Saw that Cuts; the “Why” of this
Difference.—Why Some Men do Much More Work than Others, and with
Greater Ease, when Sawing.