RESPIRATORY DISEASES 



155 



Fig. 49, Skiagraph op Head and Neck of Chicken 

 A, Trachea. C, esophagug, C, vertebra. D, crop, filled with grains 

 of wheat. " E, infraorbital or maxillary sinus. F, frontal sinus, 

 G, feathers. H, nostrils. T, eyes. ^ J, musculature. 



