The Star Porcelain Co. and Jeffery-Dewitt Co. made spark plugs from steatite
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[Trade Journal] Publication: The Horseless Age New York, NY, United States |
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(We understand that steatite comes from Bavaria, Germany, and is not obtainable in this country at present. Porcelain insulators for spark plugs are made by the Jeffery-Dewitt Company, Detroit, Mich. And the Star Porcelain Co., Trenton, N. J. Wire for spark plug points can be obtained from H. Boker & Co., 101 Duane street, New York; Baker & Co., Newark, N. J., and Driver-Harris Wire Co., Harrison, N. J. - Ed.)
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