Thomas catalog

The R. Thomas & Sons Company, East Liverpool, O., have ready for distribution Catalog No. 12, devoted to illustrations and descriptions of transmission-line insulators for all voltages. This is one of the handsomest catalogs that has been brought to our attention, and forms a classic in the literature devoted to the subject. The information relating to testing equipment and the company's capacity and convenience for the investigation of electrical phenomena entering into the design of insulators is especially interesting. The catalog should be in the possession of transmission-line engineers and executives of light and power companies. There is also considerable information of peculiar interest to the engineers of telephone and telegraph companies, electric railways, and large industrial plants.