infix dictionary using slave1850_1.dat {
 year       1-2
  datanum   3
  serial     4-8
  slavenum  9-11
  weight  12-13
  reel   14-17
  pageseq 18
  pageno 19-22
  line 23-25
  statefip 26-27
  stateicp 28-29
  county 30-33
  oversamp 34
  compcnty 174
  city 35-38
  citypop 39-42
  enumday 43-44
  enummo 45-46
  sizehold 47-50
  numtakn 51-54
  samptype 55
  pgcnty 56-58
  age 59-61
  agemonth 62-63 
  sex 64
  color 65-67
  fugitive 68
  manumit 69
  blind 70
  deaf 71
  idiotic 72
  insane 73
  noholdrs 74-75
  nfugitvs 76-77
  nmanumts 78-79
  nhouses 80-82
  sh1typeg 83
  sh1typed 83-84
  sh2typeg 85
  sh2typed 85-86
  sh3typeg 87
  sh3typed 87-88
  sh4typeg 89
  sh4typed 89-90
  sh5typeg 91
  sh5typed 91-92
  sh6typeg 93
  sh6typed 93-94
  sh7typeg 95
  sh7typed 95-96
  sh8typeg 97
  sh8typed 97-98
  qqc 99
  qage 100
  qagemon 101
  qsex 102
  qcolor 103
  qowner 104
  qhouses 105
  qfugitiv 106
  qmanumit 107
  qogeog 108
  qholdsz 109
  str sh1ln 110-125
  str sh1fn 126-141
 str sh2ln 142-157
 str sh2fn 158-173
}