gs N 
orto meen dy 
S 
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aero W--77 74 
BREATHING APPARATUS. 
a, Solid Lungs, not movable. 6, c, Bones of the Bod , the Breast-Bone, c, extending the length of, the body. 1, 2, 3 4s 
5; 6, Air-Cells of the Chest and Abdomen, the dotted lines s' owing the outline when the cells are inflated in breathing, 
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