Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)
Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 37
visions as feet and thefractional divisions asinches, one can readilyscale the length of a rafterby placing another squareas shown in Fig. 31 andreading the graduationsu])on it as feet and inches. A rule graduated to twelfths will serve in place of this second square. 29. Plumb and Level.—Fig. 32… … Fig. 31. Obtaining Rafter Length BY Scale Method.
Woodwork (Manual training)
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