. Fig. rpprespiitation of the air" sacs showiiif^ their relation to each other, and to the lunj^s. A, trachea; B, interclavicular sac; C, D, E, F, extensions of the interclavicular sac; <i, anterior thorocic sac; H, humerus; I, poster- ior thoracic sac; J, entrance of bronchial mem- brane; K, abdominal sac. number of indi- viduals. Symptoms.— In the early stages of the disease no symptoms are noticed, and it is only after it has progressed considerably that these be- come apparent. The affected birds do not follow the flock; they are very weak, scarcely able to stand, a

---

. Fig. rpprespiitation of the air" sacs showiiif^ their relation to each other, and to the lunj^s. A, trachea; B, interclavicular sac; C, D, E, F, extensions of the interclavicular sac; <i, anterior thorocic sac; H, humerus; I, poster- ior thoracic sac; J, entrance of bronchial mem- brane; K, abdominal sac. number of indi- viduals. Symptoms.— In the early stages of the disease no symptoms are noticed, and it is only after it has progressed considerably that these be- come apparent. The affected birds do not follow the flock; they are very weak, scarcely able to stand, and,

---

Size: 1714px × 2917px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, booksubjectpoultry, bookyear1899