. Annals of applied biology. Biology, Economic; Biochemistry. H. G. Thornton 267 the buffer solution standards. Where they differ from ours the " smoothed " curve readings, given by Gillespie, are plotted in broken line beside our readings. It will be seen that the two series agree closely in the case of Brom Thymol Blue, but that there is a constant disagreement of about 0-05 pH on the alkaline side in the case of Phenol Red and of about 8-5 84 8-3 8 2 8 1 80 79 7-8 7-7 7-6 7-5 7-4 7-3 i 7-2 I 71 : 70 I 6-9 I 6-8 ?6-7 i 66 ! 6-5 6-4 6-3 62 61 60 5-9 5-8 5-7 5-6 5-5 Phenol Red. I. I
. Annals of applied biology. Biology, Economic; Biochemistry. H. G. Thornton 267 the buffer solution standards. Where they differ from ours the " smoothed " curve readings, given by Gillespie, are plotted in broken line beside our readings. It will be seen that the two series agree closely in the case of Brom Thymol Blue, but that there is a constant disagreement of about 0-05 pH on the alkaline side in the case of Phenol Red and of about 8-5 84 8-3 8 2 8 1 80 79 7-8 7-7 7-6 7-5 7-4 7-3 i 7-2 I 71 : 70 I 6-9 I 6-8 ?6-7 i 66 ! 6-5 6-4 6-3 62 61 60 5-9 5-8 5-7 5-6 5-5 Phenol Red. I. I ^—1 I -I I 1 8:2 7;3 6:4 5:5 4;6 3:7 2:8 Fig. 12. Drop ratios. (Acid indicator: alkaline indicator.) 0-1 pH on the acid side, with Brom Cresol Purple. It is considered probable that this is due to slight differences in the samples of indicator used in the two cases. The smoothed curves thus experimentally obtained were used in making the readings of ^H value in the work described Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Association of Applied Biologists; Association of Economic Biologists. [Wellesbourne, Warwick, etc. ] Association of Applied Biologists [etc. ]
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