The Dental cosmos . Angeles beginning June 10, and in SanFrancisco beginning June 17, 1907. C. A. Herrick, Secy, Jackson, Cal. IOWA BOARD OF DENTALEXAMINER^. The Iowa State Board of Dental Examin-ers will hold its next meeting for examinationat Iowa City, June 6, 7, 8, 10, and 11, must hold a diploma from a collegeon the accredited list of the National As-sociation of Dental Examiners, and muststate where he attended first, second, andthird year of college. Address E. D. Brower, Secy, Le Mars, Iowa. UNITED STATES PATENTS PERTAINING OR APPLICABLE TO DENTISTRY ISSUED DURING FEBRUA
The Dental cosmos . Angeles beginning June 10, and in SanFrancisco beginning June 17, 1907. C. A. Herrick, Secy, Jackson, Cal. IOWA BOARD OF DENTALEXAMINER^. The Iowa State Board of Dental Examin-ers will hold its next meeting for examinationat Iowa City, June 6, 7, 8, 10, and 11, must hold a diploma from a collegeon the accredited list of the National As-sociation of Dental Examiners, and muststate where he attended first, second, andthird year of college. Address E. D. Brower, Secy, Le Mars, Iowa. UNITED STATES PATENTS PERTAINING OR APPLICABLE TO DENTISTRY ISSUED DURING FEBRUARY 1907. February 843,208, to Charles W. Hieber. 843,273, to Willy Homann. Dental burand excavator. February 12. No. 844,079, to Ellsworth Armstrong. Den-tal matrix. No. 844,181, to Charles M. floss holder. February 19. No. 844,395, to Eduard Pexkala. Tooth-brush. No. 844,781, to Henry P. Davis. Dental goldpellet holder. February 26. No. 845,064, to Frederick P. Drowxe. DR. J. HALL MOORE. THE Dental Cosmos. Vol. XLIX. MAY 190i ~So. 5. Original communications. THE PRESENT STATUS OF THE PORCELAIN By J. Q. BYRAM, , Indianapolis, lnd. (Read before Section I of the National Dental Association, Atlanta, Ga., September 18, 1906.) THERE are periods in the history ofthe dental profession when itsthought seems to be turned largelyto one subject. We have just passedthrough the porcelain era, and many ofthe leading journals have been devotinga large amount of space to porcelain. Wenow have another outburst of enthusiasmon inlays, but this time the enthusiasmis for the gold instead of the porcelain in-lay. After the gold inlay has run itscourse we shall be so familiar with theinlay principle of filling teeth that noprogressive dentist should plead igno-rance of the subject. While a great deal has been writtenon porcelain, many of the writers,through a fit of enthusiasm, have madestatements which have caused disap-pointment to thos
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