. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. PHYSIOLOGY OF OLFACTION 51 that surface by an appropriate movement of the inner tube will produce a stimulus of two olfacties and so forth. Thus a graded series of measured olfactory stim- uli can easily be obtained. Further, by using outer tubes carrying different odorous substances, various com- parisons can be instituted as measured in olfacties. Moreover, a double olfactometer (Fig. 14) may be easily. '*.—Double olfaotometer. Alter Zwaardemaker, 1895, Fig. 15. devised in that two single olfactometers
. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. PHYSIOLOGY OF OLFACTION 51 that surface by an appropriate movement of the inner tube will produce a stimulus of two olfacties and so forth. Thus a graded series of measured olfactory stim- uli can easily be obtained. Further, by using outer tubes carrying different odorous substances, various com- parisons can be instituted as measured in olfacties. Moreover, a double olfactometer (Fig. 14) may be easily. '*.—Double olfaotometer. Alter Zwaardemaker, 1895, Fig. 15. devised in that two single olfactometers may be combined so that one current carrying an odorous material of a given concentration may be introduced into one nostril and another carrying a second odorous substance of known concentration can be introduced into the other nostril, or both currents may be united and the odorous mixture thus produced can be let into one nostril. Thus a variety of comparisons may be easily made. Van Dam (1917b) has modified Zwaardemaker's ap- paratus by applying the odorous material in the form of. 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
