_Symptoms._ There are first dullness and sluggish movements, followed by indisposition to move, the bird standing in one place with ruffled feathers and drooping wings, and at intervals, projecting the head forward with open beak and in some cases a little liquid is rejected. If the bird is now caught and examined the crop is found to be firmly distended, and more or less compressible or indentable according to the nature of the food impacted. In most cases and especially if the food has been green or aqueous, there is a certain resiliency from the presence of gas outside the solid impacted mass. _Treatment._ This must be in the line of seconding the physiological efforts of regurgitation which is a normal and common act in birds. The duck which has gulped a mouse half-way down the cervical part of the œsophagus will readily disgorge it when he finds it impossible to pass it further. The carnivorous birds often reject by vomiting the indigestible debris such as feathers and bones, after all the more soluble parts have been disposed of in the stomach. The pigeon even feeds its young by disgorging into their open bills, the semi-digested food and milk from its crop. Following these indications we must break up the contents of the crop by manipulation and force them in small masses upward into the bill and downward to the proventriculus. The rejection by the bill may be further stimulated by introducing the finger into the fauces to rouse the reflex active emesis. Usually the crop can be quickly and satisfactorily emptied in this way. When this proves impossible there remains the operation of direct incision through the walls of the crop and the evacuation of its contents. This can be done by a pocket knife or even a pair of scissors. The crop is punctured in its lower part and the incision is continued upward as far as may be necessary to allow the escape of the contents. Usually half an inch will suffice. Then the crop is squeezed so as to press the contents through this opening and it is emptied by a process of enucleation. If the contents are fibrous it may be necessary to employ forceps to dislodge the material. The empty crop may be washed out with tepid water, any food attached to the raw edges of the wound must be removed and the skin stitched accurately together. The wound rarely fails to heal by first intention. To avoid stretching it, the food for a day or two should be restricted to milk, gruels, or a little soft mash. Lerein notices jaundice as a sequel of impacted crop, and recommends treatment by sulphate of soda in the water. TYMPANITIC INDIGESTION IN THE RUMEN. BLOATING.