. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 460 Comparative Animal Physiology i<. Fig. 149. Curves illustrating the relation between the response of Drosophila and the concentration of ethyl alcohol. Solid circles, per cent males responding; t)pen circles, per cent females responding; solid lines, the per cent males and females attracted; broken lines, per cent males and females repelled. After Reed,"' from Dethier.'" fication may eventually be replaced by one which is objective and based on some chemical or physical property of the stimulus.
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 460 Comparative Animal Physiology i<. Fig. 149. Curves illustrating the relation between the response of Drosophila and the concentration of ethyl alcohol. Solid circles, per cent males responding; t)pen circles, per cent females responding; solid lines, the per cent males and females attracted; broken lines, per cent males and females repelled. After Reed,"' from Dethier.'" fication may eventually be replaced by one which is objective and based on some chemical or physical property of the stimulus. One oF the earliest and still acceptable subjective classifications of odors is that of Zwaarde- maker,''"' who divided odors into nine classes, with two or more subdivisions: Class Subdivisions 1. Ethereal (a) Fruit, (fo) Beeswax, (c) Ethers 2. Aromatic (a) Camphor, (/O Cloves, (c) Lavender, (ci) Lemon, (e) Bitter almonds 3. Balsamic or Fragrant («) Flowers, (fo) Violet, (c) Vanilla and coumarin 4. Ambrosial 00 Amber, (f?) Musk 5. Alliaceous («) Sulphuretted hydrogen, (/?) Arsine, (c) Chlorine 6. Empyreumatic (a) Roast coffee, (fo) Benzene 7. Caprilic («) Cheese, (fo) Rancid fat 8. Repulsive (a) Deadly nightshade, (b) Bed-bug 9. Nauseating or Fetid (a) Carrion, (b) Feces. 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
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