34 BULLETIN 817, U. S. DEPT. OF AGRICULTURE. 
October 5, 1917: Fourth mouse died 13 days after feeding. Not examined. 
October 6, 1917: Two remaining mice died 14 days after feeding. Larve 
found in lungs. ; 
October 9, 1917: The 2 mice born October 4 were examined and found free 
from infection. 
Experiment No. 7. 
November 4, 1917: A half-grown cat was fed many thousands of eggs of 
Ascaris suum. 
November 12, 1917: Cat chloroformed and examined 8 days after feeding. 
Lungs, liver, spleen, small intestine, trachea, and pharynx examined and found 
negative. 
Experiment No. 8. 
August 21, 1916: Two rats were fed bread soaked in a culture of Belascaris 
marginata incubated for 38 days in weak formalin. : 
August 22, 1916: Feces of rats contained Belascaris eggs with unhatched 
motile embryos, and a few hatched dead embryos. 
August 26, 1916: Killed one rat 5 days after feeding. Lung with hemor- 
rhagic petechiz. One active larva found. Other organs not thoroughly ex- 
amined. 
August 29, 1916: Killed second rat 8 days after feeding. Lungs with hemor- 
rhagic petechize but a hurried examination failed to reveal worms. 
Experiment No. 9. 
October 11, 1917: Fed 6 guinea pigs with culture of Ascaris suum, each 
animal receiving two pipettes—about 2.4 cubic centimeters—of the culture. The 
animals were also allowed to eat oats over which a culture of Ascaris eggs had 
been poured. 
October 16, 1917: Killed the first guinea pig 5 days after feeding. ‘The post- 
mortem showed numerous larve in the lungs, 1 larva in trachea, none in liver, 
spleen, esophagus, and small intestine. 
October 17, 1917: Second guinea pig died 6 days after feeding. Lungs in- 
tensely hemorrhagic (color of beef liver). Larvz very numerous in lungs; 
numerous in trachea. Esophagus, stomach, liver, spleen, small intestine all 
negative. The larve in the lungs varied in length from 0.35 to 0.69 mm., with 
esophagus 0.12 to 0.15 mm. in length. Those in the trachea were considerably 
larger, 0.71 to 1.183 mm. in length, 0.035 to 0.04 mm. in width, with esophagus 
0.13 to 0.15 mm. long. 
October 17, 1917: Third guinea pig died, 6 days after feeding. Lungs in- 
tensely hemorrhagic. Larvee were very numerous in the lungs, numerous in 
the trachea, several in the pharynx, 2 in the esophagus. Liver, spleen, stomach, 
small intestine all negative. Large intestine not examined. The larve in the 
pharynx varied in length from 0.6 to 1.02 mm., the largest measuring 0.045 mm. 
in width, with esophagus 0.19 mm. long. 
October 18, 1917: Fourth guinea pig died from pneumonia 7 days after 
feeding. Numerous larve in lungs, several in trachea, 2 in the stomach 
0.49 and 0.78 mm. in length, both dead and degenerated, possibly from the — 
action of the digestive juices. Small intestine, liver, thyroid, Fallopian tubes, 
pharynx, all negative. Hsophagus not examined. 
October 19, 1917: Fifth guinea pig died from pneumonia 8 days after feed- 
ing. Larve very numerous in lungs, numerous in trachea and pharynx, not 
found in esophagus, liver, thyroid, submaxillary glands, stomach, and small 
intestine. 
