. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 7O D. L. HOPKINS AND PERCY L. JOHNSON. centration of pH The hay was then dried at a temperature of 50°. After burning a sample of this hay it was found that only per cent, of the total dry weight remained as ash. B. In extracting the salts from the hay as described above, considerable organic substance was removed. In order to avoid this, another method was resorted to which afforded better results. This method of electro-dialysis was used by Livingston ('07) for separating electrolytes from non-electrolytes in manu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 7O D. L. HOPKINS AND PERCY L. JOHNSON. centration of pH The hay was then dried at a temperature of 50°. After burning a sample of this hay it was found that only per cent, of the total dry weight remained as ash. B. In extracting the salts from the hay as described above, considerable organic substance was removed. In order to avoid this, another method was resorted to which afforded better results. This method of electro-dialysis was used by Livingston ('07) for separating electrolytes from non-electrolytes in manure extracts. The apparatus used is represented in Fig. i. In this. FIG. i. Apparatus for dializing timothy hay. A, inner chamber containing distilled water into which is inserted the anode of the electric circuit; B, outer chamber containing distilled water into which is inserted the cathode; C, middle chamber containing finely ground hay; D, and E, collodion membranes (the collodion imbedded in bolting cloth for support); L, carbon lamp in the circuit to increase the resistance. apparatus when the circuitl is closed the cations collect at the negative pole and the anions at the positive pole, leaving the undialyzable material behind. Frequently the acid and basic solutions formed at the two electrodes were replaced by distilled water. The dialysis was carried on for three The hay was then dried in an oven at 50° C., after which a sample was tested and the ash content found to be per cent. Since owing to the relative immobility of silicon ions it is very probable that 75 per cent, of the inorganic substances remaining in the 1 A P. D. of 55 V. is best. 2 Since it is difficult to prepare the collodion membranes, in the way used here, so that they will not leak, the use of diffusion shells is more Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of thes
Size: 1128px × 2216px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
