Dental review; devoted to the advancement of dentistry. . d be readyto learn what I can from it. The first thing T want to call your attention to is the perfecttransmission of force. These balls you see here (indicating) aresimply anti-friction balls, the same as you have in the bearingsof your bicycle, such as are used in turntables and derricks. I 350 THE DENTAL REVIEW. call your attention to the perfect transmission of force when I strikea blow holding a ball in this manner. (Indicating.) In the dis-cussion of the subject we will leave the instrument out altogether,but the effect is just th
Dental review; devoted to the advancement of dentistry. . d be readyto learn what I can from it. The first thing T want to call your attention to is the perfecttransmission of force. These balls you see here (indicating) aresimply anti-friction balls, the same as you have in the bearingsof your bicycle, such as are used in turntables and derricks. I 350 THE DENTAL REVIEW. call your attention to the perfect transmission of force when I strikea blow holding a ball in this manner. (Indicating.) In the dis-cussion of the subject we will leave the instrument out altogether,but the effect is just the same as if the blow were delivered by themallet directly upon the jaw. Dr. C. W. Jones : When I first received this paper from and read it over I had little idea it was of any practicaluse to us, but the more I studied it the more I found it of valuein our everyday practice. After getting this paper and studyingit carefully I assure you it is a subject of the greatest is one point I want to mention about the law Dr. Stearns. Ti^ 1 Fiq 2. Fiq 5 Fiq-h brought out in relation to measuring the foot power in a bodymoving horizontally. You mean lifting against gravity, dont you ? In studying Dr. Stearns paper, I casually mentioned the sub-ject to a friend of mine who is the chief engineer of one of ourgreat railroad systems, and to whom I am indebted for a few prac-tical illustrations of the use of force for impaction. In the con-struction of bridges, bridge builders use steel rods which have tobe threaded at the ends, and in threading the end of a rod of equaldiameter throughout it would make the cross section , to preserve an equal strength throughout the length ofthe rod, the end of the rod is enlarged and then threaded as in Fig. this purpose a light hammer, usually a pneumatic hammer, withhigh velocity is used cn the end of the rod which thickens the end PROCEEDINGS OF SOCIETIES. 351 of the rod just far enough for the purpose
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1901
