the square inch; 50 carbon tubing used in Hartford bicycles shows about 75,000 pounds to the square inch, and 25 carbon tubing— ordinarily used in bicycles—shows about 55,000 MODEL 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 POPE -a convincing proof of the extraordinary strength of Columbia Flush Joints and Frames. Gaillard's medical journal Edwin Samuel Gaillard, William S. McChesney |