Catalogue of dental materials, furniture, instruments, etc. (1867)
S.S. White Dental Manufacturing Company (Philadelphia, Pa.) · Lippincott's Press, Philadelphia · leaf 158
he Face-piece, which is designed to cover both mouth and nostrils, is madeof Metal, Silver Plated; the Stop-cock is of Hard Rubber. Two Valves—one forinhaling and the other for exhaling—are affixed to the bottom of the Mouth-piece,sufficiently large to allow natural respiration. Entire length of…
Dental instruments and apparatus
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