pressure, in his opinion. If, however, the abdominal parietes bo weak and bulging at the internal ring after the operation, he advises the use of a truss with a weak spring, when tho patient is at work. Mr. Wood thinks tho most likely causo of failure in this operation consists in the operator placing his ligatures too low, and closing the external ring only, whereby ho fails to obtain a hold on the posterior wall of the canal.