An American text-book of physiology . of the rabbit, in the resting condition (after Heidenhain), granules which stain readily and are imbedded in a clear ground substancewhich does not stain. The nucleus is small and more or less irregular in out-line. After stimulation of the tympanic nerve the cells show but little altera-tion, but stimulation of the sympathetic produces a marked change (Fig. 71).The cells become smaller, the nuclei more rounded and the granules are moreclosely packed. This last appearance seems, however, to be due to the hard-ening reagents used. A truer picture of what oc
An American text-book of physiology . of the rabbit, in the resting condition (after Heidenhain), granules which stain readily and are imbedded in a clear ground substancewhich does not stain. The nucleus is small and more or less irregular in out-line. After stimulation of the tympanic nerve the cells show but little altera-tion, but stimulation of the sympathetic produces a marked change (Fig. 71).The cells become smaller, the nuclei more rounded and the granules are moreclosely packed. This last appearance seems, however, to be due to the hard-ening reagents used. A truer picture of what occurs may be obtained from astudy of sections of the fresh gland. Langley,^ who first used this method, ^ Ccmiptes rendus, cxviii., 4, p. 168. ^ Archivfiir Anatomie und Physiologie, 1889, S. 96.^Journal of Physiology, 1879, vol. ii. p. 260. 168 AN AMERICAN TEXT-BOOK OF PHYSIOLOGY. describes his results as follows: When the animal is in a fasting condition thecells have a granular appearance throughout their substance, the outlines of. Fig. 71.—Parotid of the rabbit, after stimulation of the sympathetic (after Heidenhain). the different cells being faintly marked by light lines (Fig. 72, ^1). Whenthe gland is made to secrete by giving the animal food, by injecting pilocarpin,or by stimulating the sympathetic nerves, the granules begin to disappear from
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