Lewis' patented self-binding insulator is produced by four British companies.

Lewis's Patent Self-binding Insulator. — We understand that Messrs. Doulton & Co., Buller & Co., Bourne & Son, and Stiff & Son, are providing themselves with the necessary special machinery for producing this insulator in large quantities, and that, so far as regards the United Kingdom, the manufacturing of it will be limited to them. Mr. Lewis will be represented in London by several of the leading telegraph engineering firms. Some scores of trial orders have been received already, both for home and abroad, and there is every prospect of the insulator coming into universal adoption.