DR. CLAPP:—I have left this softened dentine in a great many cases, and so far as my experience goes, I have not afterwards had very much trouble. I think that, rather than expose a pulp in a patient of good health, the surrounding conditions being favorable, I should prefer to leave a small layer, disinfecting and drying as much as possible before filling. It appears to me to be a great calamity whenever I expose the pulp in this way or in any other way, and I do the best I can to avoid doing so. It has been my practice, where I thought I should expose the pulp, to leave this softened dentine, but I have seen a few cases where decay has undoubtedly continued underneath the oxyphosphate or oxychloride fillings. I think it is a matter of great importance, and one where the best judgment will sometimes go astray. DR. EDDY:—I would just like to mention that hydronapthol may be fearlessly used in all cavities without causing any escharotic action. With regard to the spongy condition that Dr. Clapp speaks of, it must be thoroughly dried out with a hot air syringe. If it cannot be thoroughly dried, it is better to remove it. DR. WERNER:—In regard to the question asked by Dr. Clapp, I should say that it would depend on the amount of sensibility yet left in the partly decalcified leathery part of the dentine spoken of. If that still has sensibility, I should believe in treating it not so much escharotically as antiseptically. Again I wish to assert my opinion, that after the foramen was closed and the tooth well developed, it would not be a great calamity for a tooth if the pulp were devitalized and the pulp cavity well filled. I am much of the opinion that a tooth in a devitalized condition resists better than a live tooth the attacks of caries. This is perhaps an extraordinary statement to make, and I know is contrary to the teachings of good authority, yet the many pulpless filled teeth I see free from decay, while their living neighbors do decay, leads me to this opinion.