==========+======+===================
Refractive| Per | Decimals to be
index | cent | added for
|solids|fractional readings
----------+------+-------------------
1.3484 | 11 | 0.0001 = 0.05
1.3500 | 12 | 0.0002 = 0.1
1.3516 | 13 | 0.0003 = 0.2
1.3530 | 14 | 0.0004 = 0.25
1.3546 | 15 | 0.0005 = 0.3
| |
1.3562 | 16 | 0.0006 = 0.4
1.3578 | 17 | 0.0007 = 0.45
1.3594 | 18 | 0.0008 = 0.5
1.3611 | 19 | 0.0009 = 0.6
1.3627 | 20 | 0.0010 = 0.65
| |
1.3644 | 21 | 0.0011 = 0.7
1.3661 | 22 | 0.0012 = 0.75
1.3678 | 23 | 0.0013 = 0.8
1.3695 | 24 | 0.0014 = 0.85
1.3712 | 25 | 0.0015 = 0.9
1.3729 | 26 | 0.0016 = 0.95
| |
1.3746 | 27 | 0.0001 = 0.05
1.3764 | 28 | 0.0002 = 0.1
1.3782 | 29 | 0.0003 = 0.15
1.3800 | 30 | 0.0004 = 0.2
1.3818 | 31 | 0.0005 = 0.25
| |
1.3836 | 32 | 0.0006 = 0.3
1.3854 | 33 | 0.0007 = 0.35
1.3872 | 34 | 0.0008 = 0.4
1.3890 | 35 | 0.0009 = 0.45
1.3909 | 36 | 0.0010 = 0.5
| |
1.3928 | 37 | 0.0011 = 0.55
1.3947 | 38 | 0.0012 = 0.6
1.3966 | 39 | 0.0013 = 0.65
1.3984 | 40 | 0.0014 = 0.7
1.4003 | 41 | 0.0015 = 0.75
| | 0.0016 = 0.8
| | 0.0017 = 0.85
| | 0.0018 = 0.9
| | 0.0019 = 0.95
| | 0.0020 = 1.0
| | 0.0021 = 1.0
----------+------+-------------------
[21] Geerlig’s table for dry substance in sugar house products by Abbé
refractometer at 28°C.
In using Table 13, find the refractive index which is next lower
than the reading actually obtained and note the corresponding whole
number for the per cent of dry substance. Subtract the refractive
index obtained from the table from the observed reading; the decimal
percentages corresponding to this difference, as given in the column so
marked, is added to the whole per cent of solids as first obtained.
Correction must also be made for the temperature if above or below 28°
C. The temperature correction is obtained from Table 14. For instance,
suppose the refractive index was 1.3750 and that the temperature was
25° C. The per cent of solids as obtained from the table would be
27.2. The correction for temperature would amount to .14, which would
be added to this reading, giving 27.34 as the per cent of solids.