Page:Popular Science Monthly Volume 9.djvu/35

Rh sharpened edge of the adze, or the straight convex edge of the hatchet and axe; the panes make all angles with the plane in which the hammer moves.



Fig. 16 is a ship-carpenter's hammer-head with claw. It differs from ordinary claw-hammers in that the handle is not strapped. In some American claw-hammers the strapping is carried up the back and



front of the hammer. Why this change has been made is not very apparent, for by it one strap—that nearest the claw—is in tension, while the other is in compression. With the straps on the sides, as in Figs. 18, 19, the tension is equal on both. Fig. 15 is a cooper's claw-hammer,



not strapped. In these cases, if much power is required when the claw is used, it should be applied by pressure on the face-end of the hammer as well as upon the handle.