Investigation of suspension insulator deterioration

This paper gives an outline of the investigation of suspension insulator deterioration undertaken by Professor H. J. Ryan and Assistant Professor J. C. Clark, and explained farther in their papers. It cites the origin of the investigation, the limiting factors encountered and methods employed to overcome such handicaps. The results of this investigation are admitted as disappointing and inconclusive on the causes of deterioration, although several causes previously considered probable have been eliminated.