SALIVA OF THE GILA MONSTER. 213 
EXPERIMENT XXIV.—December 2, 1896. Two-fifths of the solution used in the last experiment 
(XXIII) were injected in the breast muscles of a slate-colored pigeon at 3.16 P.M. 
25. Barely able to walk. 
6. Not able to stand; respiration forced. 
8. Lies on side with head drawn back. 
4. Respiration very rapid and convulsive, bill opening and shutting; head twisted on side. 
94. Apparently dead. 
0. Heart still beating. 
9 
oO. 
9 
oO. 
3. 
9 
oO. 
3. 
9 
oO. 
9 
oO. 
2 
2 
3 
39. Respiration ceases. 
3 
4 
ExpERIMEeNtT XX V.—December 2, 1896. One-fifth of solution used in experiments X XIII and 
XXIV was injected in a gray pigeon at 3.20 P.M. 
3.25. Respiration deeper. 
3.42-43. Respiration very rapid and shallow, 148 per minute. 
3.51-52. Respirations 167; can still walk, but sits immediately. 
3.58-59. Respirations 168. 
4,02. Cannot stand. 
4.04. Slight trembling. 
-4.05-06. Respirations 149. 
4.08. Head drawn back; bill opens and shuts. 
4.09-10. Respirations 62. 
4.10. Slight general contractions of muscles. 
4.114-114. Respirations 4. 
4.114-12. No respiration. — 
4.12. Death. 
EXPERIMENT XX VI.— December 8, 1896. Solution of upper-jaw saliva from one bite injected in 
breast of a gray pigeon at 3.08 P.M without effect. 
EXPERIMENT XX VII.—December 8, 1896. One-half of solution of lower-jaw saliva, same bite as 
experiment X XVI, was injected in breast muscles of a gray pigeon at 3.16 P.M. 
5.26. Pigeon very quiet. 
4.00 Drowsy. 
December 9. Well. 
December 18. Well. 
THE SouRCES OF SALIVA. 
We have seen that two very different fluids are present in the mouth of the Helo- 
derma; the one—from the lower jaw—capable of causing profound disorder when intro- 
duced into the circulation of pigeons, the other—from the upper jaw—producing no more 
effect than so much water. What are the sources of these fluids? 
