Fig. 3. An area plot versus word length for experimental BZ chemical Turing machine reactions conducted with a time interval of (a) 450 s and (b) 250 s. The range of the y-axis is 18 in both. One can observe how the range of values is greatly reduced when the time interval is reduced. Error bars indicate the standard deviation. (c) The relative change in the area metric for each of the words indicated. The dashed line marks the 44.4% decrease in the time interval between τ = 450 s and τ = 250 s. (d) The relative standard deviation of the area for the indicated words, at both τ = 450 s and τ = 250 s. It is clear that in all circumstances, the larger the time interval (and thereby, the measurement zone), the smaller the standard deviation. All of the experimental voltage traces can be found in the ESI.†.