. A manual of modern gastric methods : chemical, physical, and therapeutical . attached to a revolving drum. A time recordis also kept on the paper, and, as the movements ofrespiration affect the size of the stomach, a separateline indicates the respiratory movements, as recordedby a pneumograph (see p. 162). The methods recommended for the determinationof the motility of the stomach can seldom be em-ployed, except in cases where the motor insufficiencygives rise to such characteristic symptoms that theevidence they afford can, as a rule, be only corrobora-tive. The Po-wer of Absorption of the
. A manual of modern gastric methods : chemical, physical, and therapeutical . attached to a revolving drum. A time recordis also kept on the paper, and, as the movements ofrespiration affect the size of the stomach, a separateline indicates the respiratory movements, as recordedby a pneumograph (see p. 162). The methods recommended for the determinationof the motility of the stomach can seldom be em-ployed, except in cases where the motor insufficiencygives rise to such characteristic symptoms that theevidence they afford can, as a rule, be only corrobora-tive. The Po-wer of Absorption of the Stomach. The absorptive power of the gastric mucous mem-brane may be tested with potassium iodide. Penzoldt*recommends small doses of this salt, o*i grm. (gr. i|),enclosed in gelatine capsules. A capsule is given,and the time which elapses before iodine appears inthe saliva is determined by means of the ordinaryreaction with starch paste. To perform this test afilter paper should be moistened with starch paste * Penzoldt and Faber, Berliner klin, Wochenschr.^ 1882, No. Fig. 5.—Einhorns Gastrograjjli. (See page 111.)
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