Materials  testing  section,  assignment  to,  16-12 Materials  testing:  soil  and  concrete,  15-1  to 15-39 concrete  testing,  15-34  to  15-39 concrete  tests,  15-34  to  15-36 preparation  of  concrete  specimens, 15-37 to 15-39 slump  tests,  15-36  to  15-37 physical  characteristics  of  soils,  15-3  to 15-6 compactness,   15-4 effects  of  soil  characteristics,  15-6 gradation,  15-4 organic  soils,  15-6 particle shape, 15-3 particle size, 15-3 soil  moisture,  15-4  to  15-6 specific  gravity,  15-4 soil  classification,  15-6  to  15-7 soil soil soil classifying  soils,  15-6 classification  tests,  15-7 origin,  15-1  to  15-2 residual soil, 15-1 soil  formation,  15-1 transported  soil,  15-1  to  15-2 sampling,  15-7  to  15-17 disturbed  samples,  15-9  to  15-11 quartering  samples,  15-16  to  15-17 sampling  methods,  15-7 tagging  samples,  15-9 undistributed  samples,  15-11  to  15-16 testing,  15-17  to  15-34 Atterberg  limits,  15-29  to  15-34 determining  moisture  content,  15-18 to 15-21 mechanical  analysis,  15-21  to  15-25 specific  gravity  testing,  15-25  to 15-29 Mechanical  lettering,  3-37  to  3-41 lettering system, 3-41 line weights, 3-39 maintenance  of  mechanical  lettering equipment,  3-40  to  3-41 operating  procedures,  3-39  to  3-40 pens,  3-38  to  3-39 spacing  and  centering,  3-40 templates, 3-38 Mechanical  power  measure,  1-33 Mechanical  systems  and  plan,  8-1  to  8-24 mechanical  plan,  8-17  to  8-24 mechanical  symbols,  8-21 fitting  symbols,  8-22  to  8-23 fixture  symbols,  8-24 piping  symbols,  8-21  to  8-22 valve  symbols,  8-23  to  8-24 Mechanical  systems  and  plan—Continued mechanical   plan—Continued plumbing  layout,  8-20  to  8-21 waste  and  soil  drainage  diagram, 8-19  to  8-20 water  supply  and  distribution diagram,  8-17  to  8-19 mechanical  systems  (plumbing),  8-1  to 8-17 sanitary  drainage  system,  8-10  to 8-17 branches,  8-17 fittings,  8-11  to  8-13 joint  and  connections  8-14 piping  materials,  8-10  to  8-11 traps,  8-14  to  8-15 vents,  8-15  to  8-16 water  distribution  system,  8-1  to  8-10 fittings,  8-3  to  8-6 joints  and  connections,  8-6 pipe  insulation,  8-10 pipe  supports,  8-8  to  8-9 piping  materials,  8-1  to  8-3 valves,  8-6  to  8-8 Measurements,  units  of,  1-26  to  1-34 Mil  system,  1-30 Multi-view  projection,  5-3  to  5-20 N Nails,  6-49 Naval  Mobile  Construction  Battalion’s  standard draftsman  kit,  2-3 Noncircular  curves,  4-14  to  4-16 ellipse  by  concentric-circle,  4-16 ellipse  by  four-center  method,  4-16 ellipse  by  pin-and-string  method,  4-15 O Oblique  drawing  techniques,  5-26  to  5-28 Oblique  single-plane  projection,  5-24  to  5-28 Octagon,   4-10 Odor  test,  15-21 Office  work,  surveying,  11-7  to  11-12 Ogee  curves,  4-14 Orthographic  projection,  5-3  to  5-24 Overhead  power  distribution,  9-2  to  9-6 Overlay  sketches,  5-36 INDEX-11