EXTIRPATION OF ANTERIOR LOBE OF HYPOPHYSIS. 123 



April 29. 7 died. 



April 30. 5 died. 



May i. 5 died. 



May 2. 5 died. 



On May 2, 19 were nearly dead only the faintest heart beat 

 could be seen and only i was still active. The 20 were killed on 

 that date. 



Controls kept in neighboring sink showed no mortality. 



No. 24. April 23. Stage of operation 3-3.5 mm. 51 oper- 

 ated. Great care was exercised to avoid injury to the brain. 



April 29. i died. 



May i. 3 died. 



May 2 and 3. 36 died. 



Only 1 1 remained alive at this time. Controls kept in neigh- 

 boring sink showed no mortality. 



No. 27. April 30. Length at time of operation 3.5 to 4 mm. 

 103 operated. 3 died within 24 hours Care was exercised to 

 avoid injury to the brain. Divided into two lots. 



(a) 30 kept in aquarium bowl in soft water for 10 clays; there 

 was no mortality during this time. Transferred to sink with city 

 water on May 10. May 21 all dead but one that was dark in 

 color. 



(&) 70 kept in sink with city water from outset. 



May 4 3 dead 



" 6 i " 



" 16 10 " 



" 17 10 " 



" 18 : 13 " 



" 19 7 " 



" 21 8 " 



"24 - 9 " 



June i-io 3 



64 dead 



Missing 2 



Killed June i i 



Killed June 10, of these, i black, i gray, i white (smali) . 3 

 Controls showed no moitality during this time. 



No. 28. May 8. Length at time of operation 3.5-4 mm. 

 30 operated. On June 10 4 remained alive two killed and two 

 preserved. One of these lived until July 2 while the other lived 



