XXV111 ILLUSTRATIONS 



FIG. PAGE 



101. Premature beats (extrasy stoles) ventricular in origin 292 



102. Paroxysmal tachycardia 293 



103. Auricular flutter 294 



104. Auricular flutter 294 



105. Auricular fibrillation .295 



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



state of deep shock. (Color Plate.) . 304 



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



of ordinary and of forced respiration 318 



108. Diagram of structure of air sacs, atria, alveolar ducts, etc 318 



109* Pneumograph 321 



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



of man 325 



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



in each case 333 



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



the front ...... 335 



113. Intercostal muscles of 5th and 6th spaces 336 



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



and external intercostals 336 



115. Schema to demonstrate that the function of the internal intercartilaginous 



intercostals is identical with that of the external interosseous intercostals 337 



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



the costal angle 339 



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



the costal angle 340 



118. Diagram to show cuts required for isolation of the phrenic center .... 345 



119. Diagram to show certain positions in the medulla and upper cervical cord, 



where sections may be made without seriously disturbing the respirations 346 



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



from afferent impulses 347 



121. Diagram showing principle for measurement of the tension of CO 2 in blood 355 



122. The gas analysis pipette for the microtonometer shown in Fig. 123 . . . 356 



123. Microtonometer, to be inserted into a blood vessel 356 



124. Apparatus for collection of a sample of alveolar air by Haldane's method . 357 



125. Fridericia's apparatus for measuring the CO 2 in alveolar air 358 



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



air and arterial blood 358 



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



air was experimentally altered 359 



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



ment of CO 2 of alveolar air in normal subjects 363 



129. Curve showing the respiratory response to CO 2 in the decerebrate cat . . 368 



130. The behavior of the respiratory volume, the blood pressure and the pulse 



during progressive anoxemia 376 



131. Curves showing variations in alveolar gas tensions after forced breathing for 



two minutes 383 



132. Various types of periodic breathing 385 



