Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 601
o six square feet of flue surface, onecan readily understand how economi-cal and powerful the Imperial Boilersare for either making Steam or circu-lating Hot Water. It is largely on account of theimmense amount of direct and over-hanging fire surfaces that ImperialSectional Boilers stand so high,… … ^^fcA*^ IMPERIAL SECTIONAL STEAM BOILER. Imperial Sectional Boilers are composed of sections and can be taken through any ordinary-sized door, stairway orwindow. The sections are connected with push nipples, iron to iron, perfectly true and tight, and secured by a straightbolt passing from front to…
Building materials
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