;p.s.:
;  100*100*100          cm3   =   1m3
;  100*100*100/1000 * g/cm3  -> kg/m3
;  values presented for normal earth conditions

kgm3._etc:
  .beans         =   800
  .brick         =  1750
  .butter        =   865
  .cement        =  2950
  .concrete      =  2100
  .cotton        =   420
  .ice           =   900
  .glass         =  2500
  .potato        =   650
  .rubber        =   900
  .sand          =  1500
  .snow          =   320
  .soda          =   800

kgm3.gas:
  .air           = 1.293
  .co            = 1.250
  .co2           = 1.976
  .hydrogen      = 0.089
  .methane       = 0.716
  .nitrogen      = 1.251
  .oxygen        = 1.428

kgm3.grained_meal:
  .barley        =   610
  .bran          =   260
  .buckwheat     =   660
  .coffee        =   500
  .maize         =   760
  .rice          =   690
  .rye           =   700
  .rye_flour     =   550
  .salt          =  1500
  .starch        =   560
  .sugar         =   750
  .oat           =   420
  .wheat         =   800
  .wheat_flour   =   600

kgm3.liquid:
  .alcohol_ethyl =   790
  .acetone       =   795
  .benzine       =   750
  .glycerine     =  1260
  .kerosene      =   800
  .methyl        =   810
  .rude_oil      =   870
  .sea_water     =  1025
  .sulfuric_acid =  1850
  .sunflower_oil =   915
  .water         =  1000

kgm3.metal:
  .aluminum      =  2712
  .copper        =  8930
  .gold          = 19320
  .indium        =  7310
  .iron          =  7850
  .lead          = 11340
  .magnesium     =  1738
  .mercury       = 13593
  .nickel        =  8800
  .platinum      = 21400
  .silicon       =  2330
  .silver        = 10490
  .solder        =  8885 ;lead + tin
  .steel         =  7500
  .tin           =  7280
  .titanium      =  4500
  .tungsten      = 19600
  .zinc          =  7135

kgm3.wood:
  .acacia        =   790
  .alder         =   450
  .apple         =   900
  .ashtree       =   750
  .aspen         =   510
  .beech         =   680
  .birch         =   650
  .cherry        =   660
  .chestnut      =   560
  .cork          =   480
  .hornbeam      =   800
  .linden        =   530
  .maple         =   640
  .oak           =   690
  .paper         =   900
  .pine          =   520
  .poplar        =   550
  .plum          =   800
  .spruce        =   450
  .yewtree       =   600
  .walnut        =   640
  .willow        =   460