428 REPORT OF THE COMMISSIONER OP AGRICULTURE. 



determine the exact coiuiitious under whicli such immunity can be ac- 

 quired, if at all, and liow loti^' the i)roteetion to the system is vouch- 

 safed. From present appearances it seems oversangiiine to expect oi 

 our legislators any sufficiently vigorous and persevering- system of extin- 

 guishing our imported and indigenous animal plagues, so that it be- 

 comes the more desirable that wo should bend our energies to ascertain 

 what measures will rob the more prevalent ones of their terrible mor- 

 tality, and if the plague germs must be produced and preserved in our 

 midst, what will assure us that only the mitigated form of the poison 

 shall be laid up, and not the deadly one, as heretofore. 



JAMES LAW. 

 Ithaca, N. Y., June 10, 1880. 



APPENDIX. 



Record of Dr. Law's Experiments. 



Poland Clnnapig, infected by cohabitation. (See experiment Xo. 6, Addendum I.) 



Experiment No. 1. 



Post 'mortem examinaiion, February 17. — Skin : Deep red blotches beneath the belly, 

 in.side the fore and liind legs, under the jaws, and at the entrance of one nostril. 



Digestive organs : Mouth natural. Submaxillary and gutteral glands congested and 

 pigmented. 



Stomach : Contains food meal, with a little hay and an excess of yellow viscid mucus. 



Small inte^tinefi : Contains much glairy, yellow mucus, with some food in the lower 

 part of the ileum. Ileo-cweal valve is pigmented of a deep dirty green beneath the 

 mucous membrane. Pectum has two small circular blood extravasations. 



Liver : Mottled with purple spots. Gall-bladder full of dark green viscid bile. 



Spleen : Enormously enlarged (eleven inches long by two inches wide at its broad- 

 est part). Gorged with blood. 



Inguinal, circumflex ileac, pelvic, aublumbar, mesenteric, and omental lymphatic glands 

 pigmented. 



Kidneys: Left, natural on the surface ; cortical substance bro\vni.sh yellow; medul- 

 lary sulistance with numerous purple ecchymosis. Right has patches of congestion on 

 the surface of its outer border, and otherwise bears the same lesions as the left. 



Lungs : Have congested lobules j»artia]ly collapsed. 



Heart: Endocardium mottled of different shades, from purjile to yellowish brown. 

 Above the tricuspid valve is a considerable straw-colored exudation. 



Subdorsal lymphatic glands : Deeply congested and discolored. Prepecioral and pre- 

 scapular glands in a similar condition, and surrounded by a semi-liquid straw-colored 

 exudation. A similar exudation is found around the g;uttural glands in the perioar- 

 diiiui and around the base of the heart. 



