the stomach, is the only apology I shall make for having pressed it so much upon the attention of the Society. Its use in the pathology of that viscus, although perhaps of still more importance to the cause of suffering humanity, this is not the proper place to consider.

EXPLANATION OF PLATES XVIII, XIX, XX.

PLATE XVIII.

Fig. 1.6 parts of a square inch of the lower part of the œsophagus, magnified 15 times in diameter, or 225 times in superficies.

2

2

Fig. 2. 3 parts of a square inch of the cardiac portion, magnified 15 times in diameter, or 225 times in superficies. Fig. 3. 43 parts of a square inch of the same cardiac portion, magnified 30 times in diameter, or goo times in superficies.

2

PLATE XIX.

Fig. 1. parts of a square inch of the pyloric portion, magnified 15 times in diameter, or 225 times in superficies. Fig. 2. parts of a square inch of the same pyloric portion, magnified go times in diameter, or goo times in superficies.

Fig. 3. 16 parts of a square inch of the duodenum, immediately joining the pylorus, magnified 15 times in diameter, or 225 times in superficies.

PLATE XX.

The human stomach, in a distended state, to show a permanent contraction, which had taken place in consequence of disease, separating the cardiac from the pyloric portions.