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Cement for Glass Syringes

Take pitch, 2 parts; gutta percha, 1 part; melt together over a slow fire, apply hot, and trim with a hot knife. 2167. Quickly-Setting Rust Joint Cement. Make into a paste with water 1 part by weight sal ammoniac in powder, 2 parts flower of sulphur, and 80 parts iron borings. 2168. Slowly-Setting Rust Joint Cement. Make into a paste with water, 2 parts sal ammoniac, 1 part flower of sulphur, and 200 parts iron borings. This cement is better than the last if the joint is not required for immediate use. length of time. When in its plastic or soft