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the square inch; 50 carbon tubing used in Hartford bicycles shows about 75,000 pounds to the square inch, and 25 carbon tubingordinarily used in bicycles-shows about 55,000

pounds to the square inch. Yet Columbia patent Flush Joint Frame Connections are very much stronger even than our celebrated 5 per cent. Nickel Steel Tubing

-a convincing proof of the 'extraordinary strength of Columbia Flush Joints and Frames.

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Gaillard's medical journal

Edwin Samuel Gaillard, William S. McChesney

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