National Tube Works Company

• National Tube Works Company, No. 7 Pemberton Square, Boston, Mass., sole manufacturers of Mack's patent injector
• Price list of best quality seamless, lap welded, wrought iron and steel boiler tubes, steam, gas and water pipe, oil well tubing and casing, Mack's patent injector
• Price list of Mack's patent injectors, or boiler feeders, for locomotives and stationary boilers
• Railway catalogue
• The Mack injector