CHAPTER VIII.

ARTS OF LIFE 182

Development of Instruments, 183—Club, Hammer, 184—Stone-flake, 185—Hatchet, 188—Sabre, Knife, 189—Spear, Dagger, Sword, 190—Carpenter’s Tools, 192—Missiles, Javelin, 193—Sling, Spear-thrower, 194—Pew and Arrow, 195—Blow tube, Gun, 196—Mechanical Power, 197—Wheel-Carriage, 198—Hand-mill, 200—Drill, Lathe, 202—Screw, 203—Water-mill, Wind-mill, 204.