boilers ; Booklets dating primarily from late 19th Century through the 1930s ; nearly two dozen editions of catalogs for Volunteer, All Right and Monarch boilers (beginning in 1895) ; undated circa 1895 catalog for the Hornet Hot Water Boiler ; brochure for Page Sectional Water-Tube Waste Heat Boiler for Economical Steam Production pasted into the front of a 1920 manual entitled "Economical Steam Production: How to Build Up Boiler Efficiency" ; undated brochure on Page Cross-Drum Water Tube Boilers ; many of the earlier catalogs include telegraph codes ; folder of series of letters dated 1919-1923 with specifications for Page Sectional Water Tube Boiler ; undated flyer for Volunteer and Volunteer Junior steam and hot water boiler and tank heaters ; 7 pocket-sized booklets for boilers and radiators