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October 23, 2020 Pilkington Brothers Trademark Insulator Colors: JPG PNG Added a picture of a New England Tel & Tel Co CD 102.4 (provided by John Yindra) Library addition: Things Worth Knowing About the Telephone by the Information Department of the American Telephone and Telegraph Company, 1931, a revised version of the 1926 original October 3, 2020 New Pilkington Brothers page with library addition Now Thus—Now Thus (1926) Added 1899 article from La Nature, Les Prismes Luxfer February 9, 2020 Added images of all-colors insulator gallery with double-size thumbnails (right) Plotted prism-glass patent frequency New prism glass company added: Société Continentale du Verre-Soleil (Paris) Improved scan of James Magnusen (President and Treasurer, Chicago Sidewalk Light Co) from my 1904 CHICAGOANS AS WE SEE 'EM: CARTOONS & CARICATURES by the Newspaper Cartoonists' Association