. Botanical gazette. Plants. I9I9] ROSEâBLISTER CANKER 141 water as required by the Lowenthal method; at the same time duplicate samples were taken for moisture determination. What- ever may have been the errors introduced by this method, the agreement between duplicates taken for moisture determination was very close in most cases, as is shown in table XXVI. TABLE XXVI Percentage of dry matter in duplicate samples of various lots of bark analyzed Sample Healthy i. . " ' 2. . Diseased 4. . Dead 7 " 8 " 9. Duplicate 2 Average 47 65 47 77 45 76 45 86 46 86 46 91 49 53 49 99 4
. Botanical gazette. Plants. I9I9] ROSEâBLISTER CANKER 141 water as required by the Lowenthal method; at the same time duplicate samples were taken for moisture determination. What- ever may have been the errors introduced by this method, the agreement between duplicates taken for moisture determination was very close in most cases, as is shown in table XXVI. TABLE XXVI Percentage of dry matter in duplicate samples of various lots of bark analyzed Sample Healthy i. . " ' 2. . Diseased 4. . Dead 7 " 8 " 9. Duplicate 2 Average 47 65 47 77 45 76 45 86 46 86 46 91 49 53 49 99 49 41 49 69 49 73 49 80 64 74 64 79 75 83 76 10 The results of the analysis of 9 different samples of bark are shown in table XXVII. TABLE XXVII Percentage of tannin in healthy and diseased apple bark Description of sample Tannin (percent- age dr>- weight) Healthy I 5 16 3 64 2. 8-10 cm. from canker 3. From same tree as 6 and 9 Average Diseased A 5. From same limb as 2 6. 3 56 ^ Average 1. 14 Dead (from surface of canker) 7. From same limb as i 8 0. â I-5I \verage The Lowenthal method probably determines merely the easily water-soluble tannins, but fails to reach those tied up with ..^di. 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 Hanover, Ind. : J. M. Coulter
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Keywords: ., bookcollectionbiodiversity, bookcollectionnyb, booksubjectplants
