Smith, Leslie John, 1881- [from old catalog] · New York, The Macmillan company · leaf 22
own in the illustration, the distance is indicated as being 2from the point of one arrow to the point of the other; and, MECHANICAL SKETCHING II as the witness lines are the same distance apart as the endsof the block, the dimension shows the block to be 2 long.Often, as in the case of the \… … FlGURE 6. ness lines; but the meaning is the same. It is f^ fromthe tip of one arrow to the tip of the other, whether thearrows are on the inside or on the outside of the witnesslines. In still another instance where there is very littleroom between the witness hnes or between two lines…
Mechanical drawing
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