dical sciences. The 1nuseum sets of flanged rollers are employed, lying between the bearing-ring and the concentric tracks. The flanges of was endowed by John Hunter, who a century ago came to London to learn surgery. He be- came possessed with the idea of starting a med- ical and surgical museum… … a flattened end (Fig. 4), which is embraced by flat usually considered fatal. In one gallery there ST. LOUIS’ ROLLER-BEARING FOR BICYCLES. are the surgical appliances of all kinds, and plate springs whose function it is to hold the valves norinally in position. here may be seen samples of…
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