Electrose insulator at Niagara

In a paper read at the annual convention of the Canadian Electrical Association, H. W. Buck, chief engineer of the Canadian Niagara Power Company, has this to say about the insulators which are used at Niagara: The insulators are made of a compound known as electrose. This material is a very good insulator, is very strong mechanically, and is entirely free from cracks and other defects which are common in glass and porcelain. Similar insulators have been used on the Buffalo transmission lines of the Niagara Falls Power Company for the past three years, and they are the only insulators on those lines which have caused no trouble. It is impossible to shatter electrose insulators by stone throwing, and they will frequently turn a rifle bullet without being damaged seriously. The conductor used on this line is of aluminium of 500,000 C. M. in section and having thirty-seven strands.