| Half-hour periods. | Quantity of juice. | Digestive power. | Remarks. |
|---|---|---|---|
| c.c. | mm. | grms. flesh given. | |
| 1st | 3.1 | 5.13 | 100 |
| 2nd | 5.0 | 4.63 | |
| 3rd | 4.7 | 4.50 | |
| 4th | 5.4 | 4.88 | 100 |
| 5th | 5.5 | 3.38 | |
| 6th | 4.7 | 2.75 | |
| 7th | 6.0 | 3.75 | 100 |
| 8th | 5.4 | 2.50 | |
| 9th | 5.9 | 2.50 | |
| 10th | 5.4 | 3.88 | 100 |
| 11th | 5.3 | 3.0 | |
| 12th | 4.2 | 2.5 |
In the curve which follows, only the variations of digestive power are represented.
It is clear that the increase, both of digestive power and of juice volume, is connected with the act of taking in food.
Figure 1.—Curve of digestive power constructed from the foregoing table.
It appeared of interest definitely to determine the volume and properties of the secretion called forth by the act of eating in the dog with the isolated stomach. We endeavoured, therefore, at the beginning, to imitate the conditions of sham feeding as they occurred in the case of the dog with divided œsophagus. In addition to the fistular orifice leading into the isolated miniature stomach, another was opened into the main portion of the organ. If we now fed the dog in the ordinary way with small pieces of flesh, these were received back again at the orifice of the latter fistula, covered with saliva. Precisely as in sham feeding, after five minutes the juice began to flow simultaneously, from both the large and small stomachs. The secretion ran a corresponding course in the two cavities and ceased at the same length of time in both after the administration of food was stopped. Here is an instance taken from such an experiment performed by Dr. Lobassoff.
In five minutes the dog had eaten eighty pieces of flesh (weighing 172 grams), all of which soon afterwards dropped out at the fistula. The secretion began in both stomachs after the lapse of seven minutes from the commencement of the feeding, and proceeded as follows:
| Hour. | Miniature stomach. | Main stomach. | |||
|---|---|---|---|---|---|
| Quantity of juice. | Digestive power. | Quantity of juice. | Digestive power. | ||
| c.c. | mm. | c.c. | mm. | ||
| 1 | 7.7 | 83.2 | 5.35 mm. | ||
| In consequence of a mixture withbile (10-15 c.c.) the digestive power was greatly reduced. | |||||
| 2 | 4.5 | 6.25 mm | 58.1 | ||
| 2½ | 0.6 | 8.5 | |||
The secretion from both cavities also came to an end at the same time.
This experiment proves to us, first, that the main and miniature stomachs work in perfectly parallel manner with each other. The beginning, the end, and the intermediate variations of the secretion correspond in both cases. Secondly, the digestive power of the secretion coincides in both, and is the same which was observed in the so-called sham feeding. It has here remained at the same height till the cessation of the secretion, without falling to the lower value which we observed from the beginning of the second hour onwards, after normal flesh feeding.