Dental cosmos (1893) (14592310829)

Identifier: dentalcosmos3518whit (find matches)

Title: Dental cosmos

Year: 1893 (1890s)

Authors: White, J. D McQuillen, J. H. (John Hugh), 1826-1879 Ziegler, George Jacob, b. 1821 White, James William, 1826-1891 Kirk, Edward C. (Edward Cameron), 1856-1933 Anthony, Lovick Pierce, 1877-

Subjects: Dentistry

Publisher: Philadelphia : S. S. White Dental Manufacturing Co

Contributing Library: The College of Physicians of Philadelphia Historical Medical Library

Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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are applied ? Dont quote the text-books, as they give no particulars.—Novice. Gold Aluminum Alloy.—According to Professor R. Austen, a gold alloycont lining twenty per cent, of aluminum possesses the remarkable propertyof melting at a higher temperature than gold alone. This is an exception tothe general rule that an alloy melts at a temperature below the melting pointof its least fusible constituent. It is remarkable that the alloy of ninety percent, gold and ten per cent, aluminum follows this rule. These aluminum,alloys of gold possess beautiful colors ; that containing twenty per cent,aluminum is ruby red, those with larger admixtures of aluminum are purple.—Zahntechnische Reform. The accompanying illustration represents the remarkable case of abnormaleruption of the third molar referred to by Dr. J. M. Whitney, of Honolulu, inhis paper which appeared in the preceding issue of the Dental Cosmos, andis described on page 7 of that number. The illustration reached us after the

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paper had gone to press, but as it so perfectly represents this remarkablecase and so fully tells its own story, we publish it here as a matter of interestand record as a contribution to the history of dental abnormalities.—Ed.Dental Cosmos. l62 THE DENTAL COSMOS. To the Editor of the Dental Cosmos : Sir,—I met with an accident to-day, the possibility of which is, I think, notmentioned in any of the text-books on prosthetic dentistry. Dr. Ottolenguionce said in the Dental Cosmos, Report your failures ; they are lessonsto all, and as I am sure the same accident might easily occur to others, itseems right to publish this account, that it may serve as a warning. It hap-pened in the following manner : A fellow-student had melted the zinc for adie to help me through with my work, and when I came to pour the zincwhich was in the crucible over a gas flame, not knowing whether the metalwas overheated or had become solid again, I took an iron rod to stir themetal; but at the moment the rod

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1893

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