I take oxide of zinc, and mixing it with oil of clove or creasote, flow it carefully over the pulp, then fill out the cavity with either oxychloride, or oxyphosphate of zinc. It is true, Mr. President, that I have kept a record of the pulp exposures and my method of treating them, and the condition that they were in, but in looking over my records I found that when I wanted to get at the results, it was not a very easy matter, and it has taught me in the future to keep a little book and enter the cases of pulp exposure and treatment of dead teeth, so I can turn to a person's name and find the result at once, but, you come to look through your record-book for a case which was treated twelve or fifteen years ago and follow out the record of the patient to find whether the pulp has since died, you will have an endless job. I have one case where I had five exposures of pulp in one mouth, of a right superior molar, mesial cavity, and of the bicuspids on the same side, and the bicuspids of the left superior. They were capped eight years ago, and last year—I have not seen the patient this season—they were all tested with warm instruments or ice, and every one of them was alive. How soon they will die, of course, I cannot tell, but they were apparently in good condition when I last saw them. Another case of which I have a record, was an exposure on the mesial surface of an upper right molar, which was exposed in such a manner that with a magnifying-glass you could look into the cavity and see distinctly the pulsations in the pulp. At that time I was with Dr. Shepard, and I called him to see the case. It was extremely interesting, more so perhaps to us than to the patient. As the patient was strong and healthy, the pulp was capped in the manner I have just described, and that pulp is alive to-day. That is all the data that I can give you, Mr. President, excepting that I know, in my own practice that a majority of the pulps that I have treated and capped in that way are still alive, and I am a believer in capping certain exposed pulps. This is an exception: A patient came to my office something over two years ago. On a lower right second bicuspid was an exposure near the margin of the gum, which was capped, and that patient had not been in to see me since that day until yesterday, and would not have come then had there not been a pain in that locality. In examination I found that decay had started below the gutta-percha, upon the cervical wall, which I had placed there for protection, after the first capping, and had again exposed the pulp. The patient had suffered for two or three weeks with neuralgia before coming in. I thought it was useless to try to preserve any exposed pulps for that patient, so a new opening was made and the pulp devitalized.