ALUMINUM.—A new process of extracting this metal has been discovered, it is claimed, by which the metal can be produced for a few cents a pound. Prof. Joseph M. Hirsh, Chicago, Ills., is the one whom it is claimed has solved the problem of extracting the metal from an aqueous solution. Societies. OHIO STATE DENTAL SOCIETY. The Ohio State Dental Society held its sixth annual session in the Senate Chamber, Columbus, O., Oct. 28th, 29th and 30th, 1890, and was opened with prayer by Dr. Gladden. Dr. W. H. Sedgwick, of Granville, O., delivered an address. Fifty years ago the extraction of teeth was largely practiced. A man's ability was gauged by his mechanical skill. Since then there has been quite a change which has been wrought by the agency of intercourse, societies and literature. He compared the cheap dentist to the physician who would advertise, best prescription, fifty cents; medium quality, fifteen cents; a lawyer who had best opinions, $9.00; poor ones, 5.00; or a minister who delivers his sermons in job-lot style and attends Sunday-school in the bargain. Dental students should spend two or more years in office pupilage before entering college and they should not be received at all unless they agree to spend their time and attend the required college course before practicing. The college should reciprocate and not accept a student who has not had this previous pupilage. Every practitioner should attend associations, and these associations should be enlivened by clinics. All should take part, and the younger members especially. We need a dental law in Ohio, and the time has come to do something. It should be made unlawful to extract teeth which can be saved. The dental profession does not investigate, read and study enough. A post-graduate course would be a good thing for all. DISCUSSION OF PRESIDENT'S ADDRESS. DR. H. A. SMITH:—Drs. Harris and Taylor were the first to inaugurate dental schools. Classical education will in time be one of the requisites for admission to dental colleges. The three years' course is the cause of so many students this year. DR. M. H. FLETCHER:—Careful observers produce the best dental literature. DR. G. H. WILSON:—Our colleges are coming to require better previous education. A special course for digital culture would be a good thing. Our excellence in the latter accounts for our supremacy over German dentists. They are all brains. DR. J. TAFT:—Schools for instruction in the different branches, and graded schools would be a good thing. The class of students to-day is better than five or ten years ago. DR. C. R. BUTLER:—The demand of to-day is for better students and better dentistry. DR. D. R. JENNINGS:—The trouble with office pupilage is that the student is only taught how to master the broom, coal scuttle, dirty flasks, &c. DR. J. TAFT:—A student should be a man of good breeding. It has been urged that he should be examined by an oculist before commencing.