Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ..draughtsmen .. . each (extended) one-half its own (projected) length; thus cc and cc each equal oc; bb equalsob, etc. Then draw in light lines the traces of the various faces on the planes of the axes. Thus,ab and ab each represent the trace of a plane cutting the c-axis at infinity, and the other axesat either one or two units distance; the former intercepting the two units on the 6-axis and the oneon the a-axis, while for ab it is exactly the reverse. Through
Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ..draughtsmen .. . each (extended) one-half its own (projected) length; thus cc and cc each equal oc; bb equalsob, etc. Then draw in light lines the traces of the various faces on the planes of the axes. Thus,ab and ab each represent the trace of a plane cutting the c-axis at infinity, and the other axesat either one or two units distance; the former intercepting the two units on the 6-axis and the oneon the a-axis, while for ab it is exactly the reverse. Through the intersection of ab and aba line is drawn parallel to the c-axis, indefinite in length at first, but determinate later by theintersection with it of other edges similarly found. The student may develop in the same manner the forms oo:3:l; oo:2:3; oo;3:4; oo:4:5. APPENDIX. p. R. R. STANDARD RAIL SECTION. 100 LBS. PER YARD. Draw the above either full size or enlarged 50 %. In either casedraw section lines in Prussian blue, sjjacing not less than one-twentiethof an inch. Dimension lines, red. Dimensions and arrow heads, and numerals either in Extended Gothic or Reinhardt Gothic.
Size: 1465px × 1705px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjec, booksubjectlettering
