XXVII. Respiration in man; lung capacity and strength 



of inspiration and expiration; chest measure^ 



merits; the preservation of the data. 



/. Instruments. Spirometer; pneo-manometer; meter tape; 

 steel calipers; standard, with horizontal arm for meas- 

 uring height; scales for taking weight. 



2. Observations, 



(1) Test with the spirometer the lung capacity of each 

 member of the division. May differences in lung ca- 

 pacity be accounted for by difference in stature, condi- 

 tion, occupation or habit? 



(2) Take with the tape the girth of chest over the nipples 

 in a plane at right angles with the axis of the thorax. 

 (0) With chest in normal repose. 



() At the end of forced expiration. 

 (Y) At the end of forced inspiration. 



(3) Take the girth of chest over the juncture of the 

 ninth rib with its cartilage, holding the tape in a plane 

 at right angles with the axis of the thorax. 



(a) With the chest in repose. 



() At the end of forced expiration. 



(Y) At the end of forced inspiration. 



(4) With the calipers measure the dorso-ventral diameter 

 at the level of the nipple, holding the calipers in a 

 plane perpendicular to the axis of the thorax. 



(0) Normal, () after expiration, (Y) after inspiration. 



(5) Take the lateral diameter in the nipple-plane. 



(<*) Normal, () after expiration, (Y) after inspiration. 



(6) Take the lateral diameter at the ninth rib. 



(a) Normal, () after expiration, (Y) after inspiration. 



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