The essentials of descriptive geometry . een H and P is really an ettdview of H. This latter coincides, after the planes are revolved,with the G. L. for H and V. In actual work the three planes are not limited m extent andtheir location is determined only by the ground hnes. Fig. 10 Plan Elevation End View Fig. 10. shows how Fig. 9 appears as usually drawn with only the groundlines showing the planes. 14. The arrangement of the three planes for all quadrants isshown pictorially in Fig. 11, with the profile plane on the it will be observed that if the profile plane be revolved sothat
The essentials of descriptive geometry . een H and P is really an ettdview of H. This latter coincides, after the planes are revolved,with the G. L. for H and V. In actual work the three planes are not limited m extent andtheir location is determined only by the ground hnes. Fig. 10 Plan Elevation End View Fig. 10. shows how Fig. 9 appears as usually drawn with only the groundlines showing the planes. 14. The arrangement of the three planes for all quadrants isshown pictorially in Fig. 11, with the profile plane on the it will be observed that if the profile plane be revolved sothat the portion for the third quadrant fall to the right of theV plane the profile plane for the first quadrant will, of course,revolve in the opposite way, and will be coincident with V. This 14 ESSENTIALS OF DESCRIPTIVE GEOMETRY is shown in Fig. 12 where a timber is partly in the first and partlyin the third quadrant. In practical drafting, however, the arrangement of the threeplanes for the first quadrant is as shown in Fig. 13 where the. Fig. II. block shown at A is projected. The P plane is revolved out ofthe way of the elevation in the same way as for the third quad-rant, thus avoiding the confusion which might result from havingthe end view superimposed upon the of the problems constantly before the draftsman for sola- PROFILE PLANE 15 0 \ /\ ^--i x^ \ f ^ \\ ; ^ ^^ Nxli \ / \\ \i \ p 0^ 0 Fig. O ? p ? I ! I I < < I ? i - \o ...-A/
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400462, bookyear1915
