564 REPORT OF THE COMMISSIONER OP AGRICULTURE. 



On another calf received at tlie experimental station October 27, 

 1885, an injection was practiced as in the first calf, January G. It was 

 killed January 9. Near the place of puncture in the trachea severu] 

 .small extravasations were observed. No inflammation produced. Re- 

 gions of hepatization were present in this lung, but no trace of lung- 

 worms could be discovered. 



A third calf, presumably affected with lung-worms, which had been 

 at the station since October 21, was treated January 12, 1886, in the 

 same way. For a few moments anajsthesia was very marked. To avoid 

 any doubt as to the presence or absence of lung- worms in this animal, 

 independent of any effects due to the injection, it was killed on the fol- 

 lowing day. The thorax contained large quantities of chocolate-colored 

 serum. There were a few small extravasations under the mucous mem- 

 brane of the trachea near the puncture, and a diffuse reddening of the 

 entire tracheal membrane. In both lungs the anterior lobes were com- 

 pletely hepatized and full of serum, which flowed abundantly on sec- 

 tion. The bronchi in these lobes were occluded by plugs of very thick, 

 whitish mucus. Other regions of localized hepatization pointed to 

 lung-worms as a cause. These, however, were the result of some severe 

 broncho-pneumonia, probably not due to the injection, for they seemed 

 to be lesions of more advanced age. No lung- worms were present. 



In these three animals the lung- worms must have disai:)peared before 

 the injections were made, and therefore the experiments fail to give any 

 information as the effect of such injections on lung-worms. They con- 

 firm the facts already pointed out in in the preceding pages that injec- 

 tions may be borne by the bronchial mucous membrane without pro- 

 duding any marked disturbances. 



