Dislodgment of the Corpus Luteum 227 



dent decrease in the size of the uterus. Recovery or the recur- 

 rence of estrum occurred in one cow 4 weeks after the com- 

 mencenieut of the treatment. 



When symptoms of soda poisoning appears such as weakness 

 and diarrhose, the administration of the sodium bicarbonate must 

 be suspended for a few days. 



III. The Dislodgment of the Corpus Luteum. 



According to our observations, extending over many years and 

 including a large number of cases, we have reached the conclu- 

 sion that this operation has not yet received the deserved atten- 

 tion. When carefully carried out it is not dangerous, causes 

 little pain and the succeeding straining rapidly disappears. 

 Aside from the fact that the elimination of the yellow bodies by 

 inducing an active hyperaemia of the uterus, which awakens its 

 contraction and increases the auto-antiseptic power of the geni- 

 tal canal when affected with pyometra and thus serves a funda- 

 mentally useful purpose in this direction, we have also been led 

 to apply this new therapeutic measure to other cases with now 

 and then good results. 



It has proven useful in chronic purulent and catarrhal en- 

 dometritis when combined with massage of the uterus, provided 

 that the condition was not dependent partly upon tuberculosis 

 or malignant neoplasms. 



It has also proven valuable in the induction of artificial abor- 

 tion in young heifers which have been impregnated too early, and 

 in cows with large callus formation in the pelvis which would 

 prevent parturition at full term. The expulsion of the fetus 

 accompanied by the membranes follows in from 24-72 hours 

 after the operation. 



This plan of handling, at least so long as the ovary can be 

 reached and grasped, is far preferable to the use of drugs de- 

 scribed in our literature as competent to induce labor pains. 

 The elimination of corpora lutea, in combination with gentle 

 massage, is ineffectual in cows in which a mummified fetus is 

 lodged in the uterus, a fact jvhich must be attributed to the con- 

 dition of the uterine walls themselves. 



The fact that estrum does not appear while the yellow body 

 persists is of great scientific and practical interest. The condi- 

 tion that, so long as a corpus luteum persists, estrum does not 



