The Dental cosmos . tal Surg. Douglas E. Foster,Camp Campbell, Samar, to Warwick Bar-racks, Cebu, for duty. (March 9, D. V.) DNITED STATES PATENTS PERTAINING- OR APPLICABLE TO DENTISTRY ISSUED DURING APRIL 1907. April 2. No. 848,863, to I. Stern. Reinforce andbacking for artificial teeth. No. 849,208, to L. H. Crawford. Dentalhandpiece. No. 849,209, to L. H. Crawford. Combinedmouth-mirror and lamp. No. 849,297, to G. J. Weber. Dental swa-ging device. No. 849,335, to L. Markwitz. Electric den-tal furnace. April 9. No. 849,702, to Chas. A. Sevier. Guard andmoistener for dental tools. April 16. N
The Dental cosmos . tal Surg. Douglas E. Foster,Camp Campbell, Samar, to Warwick Bar-racks, Cebu, for duty. (March 9, D. V.) DNITED STATES PATENTS PERTAINING- OR APPLICABLE TO DENTISTRY ISSUED DURING APRIL 1907. April 2. No. 848,863, to I. Stern. Reinforce andbacking for artificial teeth. No. 849,208, to L. H. Crawford. Dentalhandpiece. No. 849,209, to L. H. Crawford. Combinedmouth-mirror and lamp. No. 849,297, to G. J. Weber. Dental swa-ging device. No. 849,335, to L. Markwitz. Electric den-tal furnace. April 9. No. 849,702, to Chas. A. Sevier. Guard andmoistener for dental tools. April 16. No. 850,661, to J. A. Lewis. Dental 23. No. 851,483, to G. Bartlett. Moistening at-tachment for dental engines. No. 851,501, to E. L. Detrick. Tooth-brush. No. 851,550, to J. C. Nevius. Tooth-brushguard. No. 851,578, to W. O. West. Artificial 30. No. 851,735, to C. M. Do well. Dental ap-pliance. No. 852,159, to J. Bode. Dental tool , to E. De W. R. Garden. Arti-ficial DR. J. BOND LITTIG. THE Dental Cosmos. Vol. XLIX. JULY 1907. No. Original Communications. FURTHER INVESTIGATIONS OF THE SUBJECT OF WASTING. By W. D. MILLER, , , , , Berlin, Ger. I. The Amphoteric Reaction. IN the April issue of this journal aletter will be found addressed by to the Editor, under the head-ing Dr. Millers Litmus Test/ in whichthe question of the reliability of the lit-mus test in connection with studies on thesubject of wasting is called in Editor in replying confirms thedoubts expressed by Dr. Head, and em-phasizes the necessity of adopting othermeans to determine the acidity of thesaliva, and thus learn whether it may bethe fact in any given case that althoughthe saliva may turn red litmus paperblue, there may nevertheless be acid saltspresent which are chemically capable ofacting upon enamel detrimentally. The title Dr. Millers litmus test ismisleading, since I have no particularlitmus test, but made use of
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