[Interior, boiler room.]

[Interior, boiler room.]

[Interior, boiler room.]

Manhattan College. Interior, boiler room

Furnace and boiler room

Furnace and boiler room

[Interior, boiler room.]

[Interior, boiler room showing fire damage.]

Interior, manufacturing shop with boiler, oven and bags

153 Madison Avenue. Redlich & Company, silversmiths. Interior, boiler room

116 West 32nd Street. Milliner. Interior, boiler room

[Machine room.]

["Gulf Queen", boiler room looking to starboard.]

[Interior with machinery.]

[Interior, detail of meters.]

71 Morton Street. Interior, boiler

Sixth Avenue. Boilers

[Interior, radiator manufacturing shop.]

Ajax [Ajax Cloth Sponging Co.] Boilers

533 West 57th Street. Pavelle Laboratories. Interior, photo lab boiler room. Construction view