DR. GILLETT:—Dr. Briggs' remarks concerning injecting cocaine solution, and removing pulps in this way, brought to my mind that the chief use that I make of cocaine is in connection with arsenious acid, when I am going to destroy a pulp. My method is to moisten the end of an instrument, and pick up with it some of the cocaine crystals, making a pellet the size of two or three pinheads, and seal it in with the arsenious acid. I find it very helpful in controlling the pain in connection with such application. PRESENTATION OF SPECIMENS. PRESIDENT COOKE:—Dr. Gillett will show a warm-air apparatus. DR. GILLETT:—I was prompted by the note on the card, saying that an apparatus for obtunding dentine would be shown, to bring up this apparatus, which some of you have seen before, as Dr. Brackett exhibited it at the last meeting of the American Academy of Dental Science. This is an apparatus for obtunding sensitive dentine, of which there are but a few of its kind in the country, and this particular one was sent to Dr. Brackett by Dr. Bogue, of New York. I have used it some for the last two or three weeks, and find that it is possible to produce very good results without hurting the patient. Those who have used Dr. Waite's obtundent, and have gotten satisfactory results with it, will perhaps appreciate my explanation in this way. I have used that with considerable success, and like it very well, and I find that I can do the same work with this apparatus, with the additional gain that its application is not painful, as a rule. It is simply a means of obtaining dryness in the cavity by the use of a continuous current of warm air. H. L. UPHAM, D.M.D., _Editor Harvard Odontological Society_. PHOSPHATE OF ZINC CEMENT AS ANCHORAGE FOR PERMANENT FILLINGS.[2] BY C. J. PETERS, D.D.S., SYRACUSE, N. Y. About six years ago I read a paper before the Syracuse Dental Society on the subject, "Oxy. Phosphate," in which my main object was to bring forward the idea of its use as anchorage for amalgam fillings in particular. After the experience I have had with the method, I have nothing to retract, but can reiterate with emphasis every word said then. This, now, is no new untried thing I bring before you. For the last two years it has been talked of more or less throughout the country. I conceived the idea early in 1884 when a lady came to me for treatment in whose mouth were four teeth which two years previously she had been told were beyond saving, but had neglected having them extracted on account of the dread of the operation. I treated three of these teeth and filled the roots, but could think of nothing that would be retained in the crown but cement. I wondered if amalgam would stick to cement as the cement does to tooth structure. I tried it, and was successful, and those three fillings are in to-day and can be produced at any time.