First lessons in wood-working . J^i^y. //. Wood - Working. 35 r, i^ placed 3 from one of the narrow faces andV from one of the wide faces, we indicatethis as in Fig. 12, making the drawing per-haps a little larger thanbefore, so as to be ableto write all the necessarydimensions. This, how-ever, does not show howdeep the hole is. Supposewe find it to be 2^ at the front of the block again,you will understand that, if we could lookinto the block, the hole would appear as ata b, Fig. 13. As the lines at a 6 are, how-. , ^ ^ ? ^ r ~~ ^ ct >sj ^ ?| Tt^. 13, ever, hiddenby the m
First lessons in wood-working . J^i^y. //. Wood - Working. 35 r, i^ placed 3 from one of the narrow faces andV from one of the wide faces, we indicatethis as in Fig. 12, making the drawing per-haps a little larger thanbefore, so as to be ableto write all the necessarydimensions. This, how-ever, does not show howdeep the hole is. Supposewe find it to be 2^ at the front of the block again,you will understand that, if we could lookinto the block, the hole would appear as ata b, Fig. 13. As the lines at a 6 are, how-. , ^ ^ ? ^ r ~~ ^ ct >sj ^ ?| Tt^. 13, ever, hiddenby the ma-terial of theblock, we^will indicatethem by dot-ted lines. In the same manner the hole may be shownin the plan. The three figures being nowbrought together as in Fig. 14, they givecomplete information as to the size and shape 36 Manual Training, of the block. This group of drawings thusmarked, with the dimensions of all the parts,we will call a Figured Sketch or Work-ing Sketch. It is not necessary that thelines be ruled, provided they are drawn toler- £ £ Lcvcztion^. 2 1 ? 11
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Keywords: ., bookcentury1800, bookdecade1880, bookidfirstlessons, bookyear1888
