244 ARTHUR WILLIAM MEYER 



hemolymph nodes in a dog after splenectomy but I have unfor- 

 tunately only been able to find the report by title. Vincent 

 (43) upon' examining a dog 16 months after splenectomy stated 

 that "There was certainly no increase in the number or size of 

 the ordinary lymphatic glands, but there were some half dozen 

 (rather more than the usual number) of the intermediate form 

 referred to above, i.e., which showed some signs, even to the 

 naked eye, of containing blood." Nevertheless, in order to sat- 

 isfy himself further regarding this matter Vincent performed 

 splenectomies upon five dogs varying in age from approxunately 

 one to two years. From these animals which were killed from 

 five to six months after operation, Vincent reported as follows: 

 ''In none of them could I be sure that there was any increase 

 in size and number of the hemal lymphatic glands, nor could I 

 assure myself that of those present any larger portion than usual 

 was occupied by a blood-sinus instead of a lymph sinus." These 

 observations of Vincent seem to confirm the findings though not 

 the conclusions of Tizzoni (35 and 36). The latter found red- 

 dened lymph nodes in only two out of four splenectomized dogs. 

 In dog III one reddened node was found in the abdominal and 

 thoracic cavities. That in the former had a reddish medulla 

 only but that in the thoracic cavity was reddish brown through- 

 out. All external lymph glands were normal. In dog iv the 

 latter was also the case but the abdominal lymphatic glands 

 which were of normal volume had a very red medulla while the 

 thoracic glands near the termination of the thoracic duct were 

 large and red throughout. Strangely enough from the findings 

 in two out of four dogs Tizzoni (40) concluded as follows: 



Les alterations que nous avons constatees dans les glandes lympha- 

 tiques internes abdominales et thoraciques consistaient en un grossisse- 

 ment de ces glandes et dans une coloration rouge intense de leur sub- 

 stance medullaire. Ces alterations etaient toujours plus prononcees 

 dans les glandes du cote gauche que sans celles du cote droit, et d'autant 

 plus marquees, que le temps ecoule depuis Toperation etait plus court; 

 elles etaient toujours plus accentuees dans les glandes situees pres de 

 I'embouchure du canal thoracique. A I'examen microscopique ces le- 

 sions etaient representees par une forte dilation des sinus se la substance 

 medullaire a la suite de I'accumulation de globules rouges libres, de 

 cellules globuliferes et pigmentiferes, abstraction faite des cellules lym- 



