Publications for 12/1912

• Jeffery-Dewitt outgrows its former plant
• California making addition to machine shop
• Factory Growth, factory addition started, now making milk bottles
• Imperial Porcelain Works specialties distributed all over the world
• California Glass Insulator factory to double it's capacity
• California Glass Insulator Co. is expanding
• IMLAY/THOMAS: High-Frequency Tests of Line Insulators
• SOTHMAN: Comparative tests on suspension insulator
• Western Glass Company
• Western Glass Company
• California Glass Insulator Company
• Diamond Glass Company, Montreal, Canada
• Diamond Glass Company, Toronto, Ontario, Canada
• New England power system