Cu
---- = per cent of invert sugar.
W
Z indicates the vertical column, and the ratio of R to I, the
horizontal column of the table, which are to be used for the purpose of
finding the factor (F) for calculating copper to invert sugar.
_Example_:—The polarization of a sugar is 86.4, and 3.256 grams of it
(W) are equivalent to 0.290 gram of copper. Then:
Cu 0.290
---- = ----- = 0.145 = Z
2 2
100 100
Z × ----- = 0.145 × ------ = 4.45 = _y_
W 3.256
100P 8640
-------- = ------------ = 95.1 = R
P + _y_ 86.4 + 4.45