102 



Scientific Proceedings (112). 



There were 13 experiments. In 6 animals there were no symp- 

 toms of consequence. Seven of the animals showed distinct 

 symptoms. Two died within two hours. Three of the remainder 

 showed pronounced symptoms. Two of these died in four to five 

 hours respectively, the third recovered in twelve hours. One 

 animal showed very slight symptoms but died in twelve hours. 

 One showed moderate symptoms, but recovered completely in 

 two hours. 



The symptoms presented by the animals were great uneasiness, 

 scratching of the nose, bucking movements, paralysis and pro- 

 nounced dyspnea. There was usually a fall of temperature of 

 5 to 7 degrees F. Autopsy of the 4 animals which died within 

 5 hours showed great distension of the lungs and peritoneal and 

 pericardial hemorrhages. No pathological changes were apparent 

 in the animal which died in 12 hours. 



Two series of control were done. (1) The blood of 17 prac- 

 tically normal infants was treated as outlined and injected into 

 guinea pigs. None of the animals developed symptoms. (2) The 

 blood of 13 infants suffering from acute infections was tested. 

 Six had pneumonia, 3 tonsillitis and 4 infectious colds with otitis 

 media. The results were negative. Three of the infants with 

 pneumonia had diarrhea. 



These experiments seem to indicate that the blood of infants 

 with a type of intestinal intoxication may show the presence of a 

 substance toxic to guinea pigs. No evidence is available at 

 present to indicate the nature of this substance or its relation to 

 the disease. 



49 (1631) 



General effects of increased and decreased pressures of oxygen 



on dove embryos. 



By OSCAR RIDDLE. 



[From the Carnegie Station for Experimental Evolution, 

 Cold Spring Harbor, N. Y.] 



Compared with hatched young or adults the dove embryo has 

 very inferior powers of adjustment to either high or low oxygen 



