136

FLUIDITY AND PLASTICITY
TABLE XXXIV.—(Continued)

Substance
A
B
C
Mean per cent difference

49
Acetic acid • •
0 42437
2,716 8
291.81
0 22

50
Propionic acid .......
0.43533
2,908.9
287 . 53
'0.41

51
Butyric acid ...............
0 . 45359
1,951.9
296.43
0.69

52
Isobutyric acid
0 45841
2,143.6
288.41
0 43

53
Acetic acid anhydride ........
0 . 40620
2,747.8
273.61
0.31

54
Propionic acid anhydride
0 39705
2,444 6
287 45
0 61

55
Diethy 6th. 6r . .
0 16574
14,674.0
256 . 72
0 07

56
Benzene ... .........
0 . 32052
2,633.1
260.82
0.05

57
Toluene .....................
0 . 32688
4,193.5
262 . 66
0.12

58
Ethyl benzene
0.34180
4 , 540 . 8
273.54

59
Ortho xylene. . .........
0.37738
3,009.3
271.96
0.28

60
Met a xylene . •
0.34134
4,542.9
266 82
0 19

61
Para xylene . . ..........
0.32087
5,127.4
277 . 17
0.20

62
Methyl alcohol
0 24316
4 498 9
279 01
0 14

63
Ethyl alcohol ......
0.28395
2,398.6
298.39
0 12

64
Propyl alcohol
0 31496
1 211 7
308 41
0 35

65
Isopropyl alcohol
0.29810
738 16
300 17
0 36

66
Butyl alcohol ... .....
0.33610
877 . 08
311.94
0 72

67
Isobutyl alcohol
0 33648
512 18
309 72
0 81

68 69
Trimethyl carbinol ........... Amyl alcohol, active ..........
0.29657 0.35020
260.86 376 . 48
305.73 311.50
0.33 1 17

70
Amyl alcohol inactive
0 36060
513 18
312 40
1 08

71
Dimethyl ethyl carbinol .......
0.29578
259 . 87
307 20
0 87

72
Allyl alcohol
0 28815
1 935 7
299 53
0 23

73
Methyl formate
0 . 34444
1,292 0
198 31
0 01

74
Ethyl formate ...............
0.29418
4 , 858 . 1
239 32
0 02

75
Propyl formate
0 29797
4 800 6
260 44
0 06

76
Methyl acetate ..............
0.26047
6,475 7
249 48
0 03

77
Ethyl acetate
0 27056
5 361 2
257 20
0 06

78
Propyl acetate. . ........
0 29534
4,262 6
267 50
0 15

79
]Methyl propionate
0 27300
5 954 3
261 08
0 15

80
Ethyl propionate.
0 29125
4 846 4
264 51
0 12

81
82
Methyl butyrate ............. Methyl isobutyrate
0.30210 0 28615
4,315.3 5 073 2
265.89 264 44
0.15 0 15

83
Methyl propyl ether ..........
0.21797
7 206 3
224 27
0 03

84
Ethyl propyl ether
0 20872
8 933 6
255 80
0 05

85
Di propyl ether. .......
0 23579
6 858 5
266 34
0 14

86
Methyl isobutyl ether .........
0.21201
8 748 8
250 76
0 03

87
Ethyl isobuty ether . .
0 22545
7 188 2
260 96
0 09 *

We will now see how far the fluidity Eq. (53) can be used to
reproduce the experimentally observed values. In Table
XXXIV we give the constants for the 87 substances investigated
by Thorpe and Rodger and in the last column of the table we
give the average percentage difference between the observed
and calculated values.
The mean percentage difference between the calculated and