. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. PHYSIOLOGY OF OLFACTION 71 stronger in each instance called forth fatigue more quickly than the weaker. Some persons are absolutely devoid of true olfaction, a condition which, as already pointed out, is attendant upon certain deficiencies in the essentials of the olfac- tory apparatus and which is designated as anosmia. 'Olfacties 11. 0 10 ZO 30 40 SO 60 TO SO 90 Sec, Fig. 16.—Curves of olfactory exhaustion produced by the action of benzoin of 9 and of olfacties and |by rubber of 14 and of 10 olfacti
. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. PHYSIOLOGY OF OLFACTION 71 stronger in each instance called forth fatigue more quickly than the weaker. Some persons are absolutely devoid of true olfaction, a condition which, as already pointed out, is attendant upon certain deficiencies in the essentials of the olfac- tory apparatus and which is designated as anosmia. 'Olfacties 11. 0 10 ZO 30 40 SO 60 TO SO 90 Sec, Fig. 16.—Curves of olfactory exhaustion produced by the action of benzoin of 9 and of olfacties and |by rubber of 14 and of 10 olfacties, acting for different periods. The threshold values in olfacties are marked on the ordinates and the duration of stimulation in seconds on the abscissse. After Zwaardemaker, 1895, Fig. 22. This state may be congenital or acquired and acquired anosmia may be either permanent or temporary. Some forms of anosmia, like color-blindness, are probably in- heritable Glaser (1918). Of considerable interest from a theoretical standpoint are the cases of partial olfac- tory defects. Winkler noted a patient who was quite incapable of smelling benzoin though he easily recognized musk and another who was just the reverse of the first. 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 Parker, George Howard, 1864-1955. Philadelphia ; London : J. B. Lippincott Company
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsensesa, bookyear1922
