. Nature study [microform]. Natural history; Sciences naturelles. ?'i i' \ thfl plane, and the saw, and compare their shapes with the wedge, yon wiU find there eiuts considerable resemblance, not only in the shape of the tools, but in their mode of action as well (Fig. 3). The axe chisel, are simply wedges with handles. The axe is driven into the material by means of the handie. The chisel is struck with a mallet just like K ! r!J**"u - ''^°^' ^'J^ *^°*"^ ''"⢠*°^ character of these tools have undergone but little change since the period of the flint implements, and ot
. Nature study [microform]. Natural history; Sciences naturelles. ?'i i' \ thfl plane, and the saw, and compare their shapes with the wedge, yon wiU find there eiuts considerable resemblance, not only in the shape of the tools, but in their mode of action as well (Fig. 3). The axe chisel, are simply wedges with handles. The axe is driven into the material by means of the handie. The chisel is struck with a mallet just like K ! r!J**"u - ''^°^' ^'J^ *^°*"^ ''"⢠*°^ character of these tools have undergone but little change since the period of the flint implements, and others are but sliriitly modified m construction to meet the demand for special application. The develoii ment of these tools has been along the line of some means to direct and limit the action of the tool as well as to provide a wedge-shaped edge of adequate strength and hardness, either forming part of the catting blade itself, as in the chisel or. /Si t9c/-/ott of frniPt 3, Ph«i \/^'ew of Axe r-^ independently of it, as in the plane. That is just what has taken place in this plane. It can be controlled better than the old one _ This is called a "jack » plane. You see, it is made of iron. Planes are made in a great variety of shapes and sizes in both iron and wood Z 7^" T*^?*'' P\?^ r ""''^ ""P^" *° *^«'' construction than the iron ones IttTtuX *i'.''r» TJr* " ''^''' P"* ** *° "'^J" - -- oblong bloS 2fZ^.^f . !, â¢''*^'V"*i *^* ""^^^ '^^ protruding slightly beyond the bottom and fastened m its place by a wedge (Fig. 4 A-22) * "^ "'â¢'""" »"« But the iron plane (Fig. 4 B) possesses manv advantajres over the woo<1*n on«uiâmuch as the sole, having once been made true, reS rLwa;s. "u s »a^]nHmg. which removes most of the difficulty attending the setting of the wood«i plane. The blade or cutting iron is secured in its place by mZs
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Keywords: ., bookcentury1900, bookdecade1910, books, booksubjectnaturalhistory
