Abstract :
This paper presents an account of work done in connection with the selection of a suitable high-tension insulator for a transmission line operated at 110,000 volts. It is a report of an investigation giving a faithful account of the motives calling for the same, the method adopted and used to carry out the work, and the line of reasoning followed in classifying the results obtained. It is not intended to be a criticism of any individual design or of the valuable work which has been done by others in the same direction. The problem which had to be solved was well defined, requiring no more difficult task than to select from a number of insulators the one best suited for certain predetermined conditions. From the first to the last, the question was one concerned with engineering only, in which biased opinion or partiality was to be absolutely absent. How well this problem has been solved may be judged from the following account and perhaps more so by the tangible results obtained in the years following, during actual operation.
