Publications for 00/1878

• Hemingray glass samples donated to University of Minnesota
• Ins. for aerial telegraph lines
• Porosity of defective insulators
• The overland telegraph
• Telegraph wire in a bird nest
• American telegraph system
• Cincinnati glass manufacturing statistics mentioned
• Second National Bank vs. Robert Hemingray
• Examples of glass insulators made by Chester and the Brooks ramshorn.
• Testing of Various Insulators for Telegraph Lines
• Testing of Various Insulators for Telegraph Lines — Discussion
• Hemingray sold 101 lbs of tubing to Illinois Industrial University