Scientific Proceedings. (233) 63 



in nearly every instance examined the peculiar Sacchus-butyric 

 type of bacterial decomposition here found is dependent upon B. 

 welchii (B. cerogenes capsulatus). Evidence is furthermore brought 

 forward to show that this organism is a prominent and perhaps 

 specific factor in some cases of advanced " primary " anemia. The 

 overgrowth of the gas-bacillus is associated with a partial disap- 

 pearance of B. coli. During convalescence the gas-bacillus recedes 

 numerically and B. coli resumes a dominant position. 



39 (131). "Absorption of typhoid bacilli from the peritoneal 

 cavity " : B. H. BUXTON and J. C. TORREY. 



Shortly after injection of typhoid bacilli into the peritoneal 

 cavity of a rabbit the organs in most experiments are found to be 

 invaded by the bacilli, more particularly the liver and spleen, in 

 which there may be enormous numbers. By means of injection of 

 lamp black, the peritoneal path for this rapid rush to the organ is 

 shown to be by way of the anterior mediastinal lymphatic trunks. 

 Even in five minutes after injection the trunks and the anterior 

 mediastinal lymph node are markedly blackened. 



On plating out the lymph nodes after injection of typhoid 

 bacilli, they are often found to contain many millions of bacilli, 

 and, as a general rule, if there are many bacilli in the lymph nodes 

 there are also many in the organs. 



40 (132). " The dicrotic elevation at different points of the 

 arterial tree " : PERCY M. DAWSON. (Presented by J. R. 

 MURLIN.) 



In a number of dogs the form of the pulse-wave was studied 

 by means of the Hurthle manometer. The arteries upon which the 

 observations were made were the following — aorta, brachioceph- 

 alic, innominate, carotids, thyroids, vertebrals, internal mammaries, 

 axillaries, brachials, left subclavian, celiac axis, superior mesenteric, 

 left renal, inferior mesenteric, left iliac, deep femoral, femoral, 

 saphenous and peripheral end of the carotid, i. e., a side branch of 

 the circle of Willis. The exact values of the apex and base of the 

 pressure triangles were determined from readings of the systolic 

 and diastolic pressures obtained by means of a valved manometer. 



A careful study and comparison of the results has led to the 

 following conclusions. 



