There is a stop-cock between the trocar and syringe, and another at right angles to the syringe. A Manual of the Operations of Surgery Joseph Bell. The operation is performed with a combined instrument called the trocar and cannula.
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Lincoln Rocker Comparison. This page will compare two Lincoln Rockers that I caned & show the differences in technique of a twenty year period. Look for use of the X & improved backs. The two rockers below are both Lincoln Rockers. Their detail trim & ornamentation are different, but both beautiful.