. Chemical reports and memoirs .... Cavendish Society; Chemistry, Physical and theoretical; Osmosis; Color; Geysers; Steam. EXDOSMOSIS. 99 merits, afford such unsatisfactory results, that I omit giving the data derived from a course of observations I pursued with respect to the mixture of solutions of salt and water, and of various salts in water. Certain general considerations may, however, be combined, serving partially to explain the results of many experiments, and partially to enable us to determine beforehand some few at least with an approximation to the truth. The cases appertaining to
. Chemical reports and memoirs .... Cavendish Society; Chemistry, Physical and theoretical; Osmosis; Color; Geysers; Steam. EXDOSMOSIS. 99 merits, afford such unsatisfactory results, that I omit giving the data derived from a course of observations I pursued with respect to the mixture of solutions of salt and water, and of various salts in water. Certain general considerations may, however, be combined, serving partially to explain the results of many experiments, and partially to enable us to determine beforehand some few at least with an approximation to the truth. The cases appertaining to the chemical mode of action of the partition may be divided into three classes. 1. The partition may exercise no chemical action upon the fluids: both permeating the substance freely, and Fi„ 7# then mixing within it. The chemical composition of the fluid within the substance of the partition, (fig. 7) will then be the simple result of the reci- procal chemical action of the two original fluids (A and B, fig. 7). The partition takes no other part in the mixture than by means of the mecha- nical capillary force it exercises: considered from this point of view, the mixture is effected pre- cisely as if both fluids were in one common vessel (see 1 to 3). 2. The partition may only suffer the constituents of one of the two fluids to pass through it. The fluid within the partition (C, fig. 7,) will then have the same composition as one of the fluids (c = A or B). The result is similar to what was spoken of at 4, where salt [is brought in contact with oil and water, or as at 9. Only such constituents as are able to penetrate the partition pass from A to B, but not conversely from B to A. 3. The partition may admit of the passage of the constituents of both fluids, but in unequal proportions. (7, therefore, will have a peculiar composition, different to that which it would have possessed, if A and B were directly mixed. The further process is the same in all three cases, and con- si
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