XXV111 ILLUSTRATIONS 



FIG. PAGE 



102. Paroxysmal tachycardia '. 278 



103. Auricular flutter 279 



104. Auricular flutter 279 



105. Auricular fibrillation 280 



106. Showing the appearance of the blood vessels in the ears of a rabbit in 



a state of deep shock. (Color Plate.) 290 



107. Diagram showing amounts of air contained by the lungs in various phases 



of ordinary and of forced respiration 301 



108. Pneumograph 303 



109. Body plethysmograph for recording respiration 304 



110. Effect of abdominal and chest breathing on the pulse and blood pressure 



of man 308 



111. First dorsal vertebra, sixth dorsal vertebra and rib. Axis of rotation shown 



in each case 316 



112. Lower half of the thorax from the 6th dorsal to the 4th vertebra, seen 



from the front 318 



113. Intercostal muscles of 5th and 6th spaces 319 



114. Hamberger's schema to demonstrate the functional antagonism of internal 



and external intercostals 319 



115. Schema to demonstrate that the function of the internal intercar- 



tilaginous intercostals is identical with that of the external in- 

 terosseous intercostals 320 



116. Diagram to show the effect of high and low positions of the diaphragm 



on the costal angle 322 



117. Diagram to show the effect of clinical displacements of the diaphragm 



on the costal angle 323 



118. Diagram to show cuts required for isolation of the phrenic center . . . 328 

 1.19. Diagram to show certain positions in the medulla and upper cervical 



cord, where sections may be made without seriously disturbing the 

 respirations 329 



120. Diagram to show where cuts are made to isolate the chief respiratory 



center from afferent impulses 330 



121. Diagram showing principle for measurement of the tension of CO 2 in blood 338 



122. The -gas analysis pipette for the microtonometer shown in Fig. 123 . . . 339 



123. Microtonometer, to be inserted into a blood vessel 339 



124. Apparatus for collection of a sample of alveolar air by Haldane's method 340 



125. Fridericia's apparatus for measuring the CO 2 in alveolar air 341 



126. Curves to show the relationship between the O 2 and CO, tensions in alveolar 



air and arterial blood 341 



127. Same as Fig. 126, except that in this case the tension of CO 2 in the 



alveolar air was experimentally altered 342 



128. Arrangement of meters and connections of Pearce 's method for measure- 



ment of CO 2 of alveolar air in normal subjects 346 



129. Curve showing the respiratory response to CO 2 in the decerebrate cat . . 351 



130. Tensions of O, and CO 2 in alveolar air at different altitudes 361 



131. Curves showing variations in alveolar gas tensions after forced breath- 



ing for two minutes 364 



132. Various types of periodic breathing 372 



