Scale = 2 epochs = 4
| 1883-1912
|
| TERM | SCORE
| | solut | 436.72
| | acid | 374.10
| | substanc | 283.51
| | chemic | 221.68
| | carbon | 196.97
| | contain | 186.83
| | salt | 186.76
| | obtain | 182.42
| | found | 180.24
| | alcohol | 164.28
| | liquid | 152.08
| | result | 127.20
| | form | 127.18
| | mixtur | 122.02
| | compound | 119.15
|
|
| 1913-1942
|
| TERM | SCORE
| | acid | 1124.56
| | solut | 1009.17
| | extract | 367.40
| | salt | 325.61
| | carbon | 322.06
| | alcohol | 304.69
| | obtain | 302.39
| | concentr | 292.86
| | prepar | 288.37
| | soil | 278.62
| | sodium | 277.47
| | contain | 277.14
| | compound | 250.62
| | found | 246.86
| | nitrogen | 243.28
|
|
| 1943-1972
|
| TERM | SCORE
| | acid | 1993.75
| | compound | 940.41
| | solut | 752.76
| | reaction | 661.63
| | extract | 545.37
| | carbon | 448.21
| | materi | 421.70
| | prepar | 421.01
| | fraction | 413.88
| | substanc | 404.35
| | alcohol | 399.01
| | contain | 391.49
| | acet | 382.68
| | product | 375.56
| | concentr | 372.81
|
|
| 1973-2002
|
| TERM | SCORE
| | reaction | 855.52
| | acid | 509.30
| | compound | 487.04
| | oxid | 437.02
| | chemic | 409.49
| | product | 361.43
| | carbon | 358.04
| | form | 348.18
| | solut | 303.85
| | concentr | 288.68
| | hydrogen | 270.30
| | format | 255.98
| | contain | 234.39
| | bond | 230.05
| | sulfur | 227.92
|
|
Scale = 3 epochs = 8
| 1883-1897
|
| TERM | SCORE
| | solut | 250.82
| | acid | 224.64
| | substanc | 192.23
| | chemic | 161.90
| | contain | 132.83
| | carbon | 131.97
| | obtain | 128.47
| | found | 116.32
| | liquid | 102.73
| | salt | 102.32
| | alcohol | 98.68
| | sugar | 89.18
| | quantiti | 85.35
| | mixtur | 81.37
| | form | 74.96
|
|
| 1898-1912
|
| TERM | SCORE
| | solut | 185.90
| | acid | 149.45
| | substanc | 91.28
| | salt | 84.43
| | alcohol | 65.60
| | carbon | 65.00
| | found | 63.91
| | result | 62.72
| | chemic | 59.77
| | contain | 54.00
| | obtain | 53.95
| | form | 52.21
| | product | 51.57
| | liquid | 49.34
| | compound | 46.41
|
|
| 1913-1927
|
| TERM | SCORE
| | solut | 423.52
| | acid | 399.16
| | soil | 241.21
| | salt | 184.65
| | carbon | 123.87
| | sodium | 121.24
| | concentr | 111.72
| | hydrogen | 108.63
| | compound | 105.91
| | nitrogen | 102.67
| | obtain | 99.50
| | reaction | 98.91
| | alcohol | 92.99
| | contain | 90.60
| | amount | 89.94
|
|
| 1928-1942
|
| TERM | SCORE
| | acid | 725.39
| | solut | 585.64
| | extract | 303.07
| | prepar | 218.57
| | alcohol | 211.70
| | obtain | 202.88
| | carbon | 198.19
| | contain | 186.54
| | concentr | 181.14
| | found | 160.65
| | sodium | 156.22
| | mixtur | 154.87
| | compound | 144.71
| | substanc | 144.62
| | method | 143.17
|
|
| 1943-1957
|
| TERM | SCORE
| | acid | 1362.98
| | compound | 578.43
| | solut | 429.96
| | reaction | 341.58
| | alcohol | 268.01
| | substanc | 250.68
| | paper | 247.65
| | materi | 242.85
| | carbon | 238.67
| | prepar | 230.42
| | nitrogen | 227.04
| | found | 220.41
| | concentr | 220.16
| | acet | 219.79
| | mixtur | 216.15
|
|
| 1958-1972
|
| TERM | SCORE
| | acid | 630.76
| | compound | 361.97
| | extract | 346.84
| | solut | 322.79
| | reaction | 320.04
| | percent | 238.01
| | fraction | 218.80
| | carbon | 209.53
| | contain | 191.29
| | prepar | 190.58
| | materi | 178.84
| | oxid | 174.65
| | form | 166.66
| | acet | 162.89
| | product | 161.97
|
|
| 1973-1987
|
| TERM | SCORE
| | reaction | 331.01
| | acid | 296.27
| | compound | 235.75
| | oxid | 202.51
| | concentr | 185.63
| | alcohol | 179.28
| | carbon | 172.58
| | chemic | 164.77
| | product | 159.54
| | solut | 158.57
| | form | 144.03
| | water | 141.49
| | sulfur | 137.31
| | nitrogen | 120.55
| | contain | 120.32
|
|
| 1988-2002
|
| TERM | SCORE
| | reaction | 524.51
| | compound | 251.28
| | chemic | 244.71
| | oxid | 234.50
| | acid | 213.02
| | form | 204.14
| | product | 201.88
| | carbon | 185.45
| | bond | 174.43
| | hydrogen | 171.96
| | format | 155.64
| | solut | 145.28
| | enzym | 123.26
| | contain | 114.06
| | catalyt | 110.58
|
|
Scale = 4 epochs = 16
| 1883-1889.5
|
| TERM | SCORE
| | solut | 130.84
| | acid | 126.90
| | substanc | 100.04
| | chemic | 79.77
| | obtain | 68.71
| | carbon | 65.33
| | contain | 64.11
| | alcohol | 57.17
| | sugar | 54.65
| | salt | 50.01
| | liquid | 48.63
| | found | 47.94
| | quantiti | 46.27
| | mixtur | 36.29
| | form | 34.40
|
|
| 1890.5-1897
|
| TERM | SCORE
| | solut | 119.98
| | acid | 97.74
| | substanc | 92.18
| | chemic | 82.12
| | contain | 68.72
| | found | 68.38
| | carbon | 66.63
| | obtain | 59.75
| | liquid | 54.10
| | salt | 52.30
| | mixtur | 45.07
| | compound | 43.35
| | alcohol | 41.50
| | form | 40.56
| | oxygen | 39.37
|
|
| 1898-1904.5
|
| TERM | SCORE
| | solut | 89.74
| | acid | 58.51
| | substanc | 43.41
| | salt | 35.85
| | found | 34.08
| | carbon | 33.15
| | liquid | 32.03
| | chemic | 29.71
| | result | 29.38
| | obtain | 28.99
| | form | 28.01
| | alcohol | 27.12
| | contain | 27.01
| | hydrogen | 25.10
| | product | 24.85
|
|
| 1905.5-1912
|
| TERM | SCORE
| | solut | 96.16
| | acid | 90.93
| | salt | 48.58
| | substanc | 47.86
| | alcohol | 38.47
| | result | 33.33
| | carbon | 31.85
| | chemic | 30.06
| | found | 29.83
| | contain | 26.98
| | product | 26.71
| | amount | 25.98
| | obtain | 24.95
| | form | 24.20
| | compound | 22.47
|
|
| 1913-1919.5
|
| TERM | SCORE
| | acid | 174.65
| | solut | 173.54
| | soil | 112.82
| | salt | 90.67
| | sodium | 56.77
| | nitrogen | 50.87
| | carbon | 50.09
| | concentr | 46.55
| | amount | 45.28
| | compound | 43.37
| | result | 42.98
| | method | 41.10
| | reaction | 41.04
| | nitrat | 40.92
| | obtain | 40.74
|
|
| 1920.5-1927
|
| TERM | SCORE
| | solut | 249.98
| | acid | 224.50
| | soil | 128.39
| | salt | 93.98
| | carbon | 73.77
| | hydrogen | 68.84
| | concentr | 65.16
| | sodium | 64.46
| | compound | 62.53
| | obtain | 58.76
| | reaction | 57.86
| | solubl | 56.90
| | alcohol | 55.65
| | contain | 52.75
| | nitrogen | 51.79
|
|
| 1928-1934.5
|
| TERM | SCORE
| | solut | 253.79
| | acid | 243.70
| | extract | 112.88
| | alcohol | 108.33
| | carbon | 106.72
| | obtain | 93.40
| | contain | 78.53
| | nitrogen | 76.84
| | result | 74.02
| | concentr | 73.73
| | found | 72.65
| | prepar | 71.24
| | mixtur | 70.56
| | method | 66.84
| | compound | 62.71
|
|
| 1935.5-1942
|
| TERM | SCORE
| | acid | 481.68
| | solut | 331.84
| | extract | 190.18
| | prepar | 147.32
| | obtain | 109.47
| | contain | 108.00
| | concentr | 107.40
| | alcohol | 103.36
| | sodium | 98.39
| | substanc | 92.43
| | carbon | 91.46
| | found | 88.00
| | mixtur | 84.30
| | compound | 82.00
| | salt | 80.83
|
|
| 1943-1949.5
|
| TERM | SCORE
| | acid | 503.94
| | compound | 242.68
| | solut | 221.51
| | reaction | 143.86
| | alcohol | 128.82
| | nitrogen | 123.94
| | prepar | 122.86
| | substanc | 114.59
| | paper | 105.33
| | product | 105.14
| | materi | 103.99
| | form | 103.82
| | found | 103.02
| | obtain | 101.93
| | concentr | 97.07
|
|
| 1950.5-1957
|
| TERM | SCORE
| | acid | 859.04
| | compound | 335.75
| | solut | 208.45
| | reaction | 197.72
| | carbon | 146.58
| | paper | 142.32
| | alcohol | 139.19
| | materi | 138.85
| | substanc | 136.09
| | acet | 127.10
| | concentr | 123.09
| | mixtur | 119.73
| | found | 117.39
| | solvent | 113.09
| | obtain | 113.06
|
|
| 1958-1964.5
|
| TERM | SCORE
| | acid | 392.31
| | extract | 219.65
| | compound | 212.46
| | solut | 191.74
| | reaction | 177.63
| | percent | 144.68
| | fraction | 140.01
| | materi | 121.53
| | prepar | 118.31
| | substanc | 107.79
| | carbon | 106.10
| | contain | 102.20
| | acet | 99.96
| | product | 93.69
| | form | 92.63
|
|
| 1965.5-1972
|
| TERM | SCORE
| | acid | 238.44
| | compound | 149.50
| | reaction | 142.41
| | solut | 131.05
| | extract | 127.19
| | carbon | 103.42
| | percent | 93.33
| | oxid | 89.59
| | contain | 89.09
| | abstract | 80.31
| | phosphat | 79.06
| | fraction | 78.78
| | concentr | 75.01
| | form | 74.02
| | mixtur | 73.02
|
|
| 1973-1979.5
|
| TERM | SCORE
| | acid | 135.06
| | reaction | 125.73
| | alcohol | 114.60
| | concentr | 114.50
| | compound | 109.44
| | oxid | 92.44
| | carbon | 92.09
| | solut | 91.10
| | water | 88.75
| | sulfur | 77.57
| | product | 77.33
| | form | 77.12
| | chemic | 70.51
| | nitrogen | 66.64
| | abstract | 60.62
|
|
| 1980.5-1987
|
| TERM | SCORE
| | reaction | 205.27
| | acid | 161.21
| | compound | 126.31
| | oxid | 110.06
| | chemic | 94.26
| | product | 82.21
| | carbon | 80.49
| | concentr | 71.13
| | solut | 67.46
| | contain | 67.34
| | form | 66.90
| | alcohol | 64.67
| | sulfur | 59.74
| | organ | 54.56
| | nitrogen | 53.90
|
|
| 1988-1994.5
|
| TERM | SCORE
| | reaction | 298.19
| | chemic | 122.04
| | oxid | 118.29
| | compound | 116.59
| | acid | 115.58
| | product | 107.85
| | bond | 98.67
| | form | 97.91
| | hydrogen | 79.96
| | solut | 77.58
| | enzym | 75.18
| | format | 69.85
| | carbon | 67.70
| | catalyt | 62.72
| | group | 60.86
|
|
| 1995.5-2002
|
| TERM | SCORE
| | reaction | 226.32
| | compound | 134.69
| | chemic | 122.67
| | carbon | 117.75
| | oxid | 116.20
| | form | 106.23
| | acid | 97.44
| | product | 94.03
| | hydrogen | 92.00
| | format | 85.78
| | bond | 75.76
| | solut | 67.69
| | contain | 60.99
| | concentr | 50.85
| | organ | 50.29
|
|