III. DISEASES OF THE ŒSOPHAGUS 145 Œsophagitis 145 Stricture of the œsophagus 148 Dilatation of the œsophagus 149 Œsophageal obstructions 152 Ruptures and perforations of the œsophagus 157 IV. DEPRAVED APPETITE—THE LICKING HABIT—INDIGESTION 158 Depraved appetite in the ox 158 Depraved appetite in calves and lambs 160 Colic in the ox 162 Colic due to ingestion of cold water—Congestive colic 162 Colic due to invagination 163 Colic as a result of strangulation 167 Diseases of the stomach 169 Indigestion 170 Gaseous indigestion 170 Impaction of the rumen—Indigestion as a result of over-eating 175 Impaction of the omasum (third stomach) 179 Abomasal indigestion 182 Acute gastric indigestion in swine 185 V. INFLAMMATION OF THE GASTRIC COMPARTMENTS 186 Rumenitis—Reticulitis—Gastritis 186 Acute gastritis 188 Catarrhal gastritis in swine 190 Ulcerative gastritis 191 Chronic tympanites 194 Gastric disturbance due to foreign bodies 198 Tumours of the gastric compartments 202 VI. ENTERITIS 203 Acute enteritis 203 Hæmorrhagic enteritis 206 Chronic enteritis (Chronic diarrhœa) 207 Dysentery in calves 210 Diarrhœic enteritis in calves 212