The Dental cosmos . These improved Separators, of course, supersede the old-style single-bar,which will, however, be supplied on special UNIVERSAL SEPARATOR. Invented by Dr. H. A. PARR. Patented September 8, 1874; October 5, 1886.

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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectdentistry