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membrane aud excite tlie heart and vessels, producing fall of pulse 

 and temperature. They act like chlorides on the nervous system 

 and glands. Iodides act as more powerful irritants, causing con- 

 gestion of the gastric and intestinal mucous membrane and vascu- 

 lar dilatation in the stomach. Their effects on the respiration are 

 either stimulant or the reverse. They cause increased tempera- 

 ture and act on the nervous system and glands like the bromides. 

 Symptoms: No prodromata : Three stages ; 1st, mild, lasts 

 twenty days ; bowels slightly loose, dung infriable, moist, green 

 balls of characteristic odour, faint at first. No loss of appetite 

 or cud, a slight thirst, slight i-edness ot" conjunctiva and discharge 

 from eyes ; respirations increased to 20 per minute, pulse 40 — 50, 

 temperature 38°C. 2nd stage lasts about niue days. The above 

 symptoms become more intense. Excrements semi-liquid, greyish- 

 green or light brown in colour ; eye discharge profuse and puru- 

 lent, white in colour ; conjimctiva bright red, respirations 25 per 

 minute, pulse 70 irregular, temperature 40°C., off feed and cud 

 almost entirely ; thirst more intense, patient dull, frequently lies 

 dowm, turns head backward, grunts at the same time, rises with 

 great difficulty, is sluggish in his movements and low in general 

 conditions, ord stage lasts only five days ; even more intense, 

 faeces quite liquid, dark, mixed with blood and of offensive odour. 

 Rectal mucous membrane dark red and pirotrudes. Eye discharge 

 thicker, milk white, glues the eyelids together. Conjunctiva florid. 

 Respirations 20 per minute, pulse 40 ; temperature 37^C. Mouth 

 filled with foaming saliva. Off feed and cud, and no desire for 

 water. Animal very weak, drowsy, and grunts constantly. 

 Weak and young animals become comatose on third or fourth day. 

 Recovery when it takes place does so between the first and second 

 stages, it is gradual, convalescence extending over two or three 

 months. The state of the dung is a guide in prognosis. In favour- 

 able cases the liquidity ceases, partially formed brittle balls are 

 formed, these fuse together and are covered with an opaque layer, 

 often with blood. Next the balls become the normal greyish 

 green. The grunt may persist for a long time and the hump 

 is a very considerable time before it returns. Aiitops;/ shows, 

 in addition to the external fippearauces above iudicale<l ; in 



