Includes note: "Heating / Note:- Boiler & Smoke Pipe to be covered / with 1 1/2" plastic 85% magnesia thoroughly / wired on. / All piping including risers to be / covered with 1" thick 85% magnesia / sectional covering with extra heavy / canvas jacket. / All risers to be valved top & bottom / with suitable (saw?)-offs. / Cover all basement galv. iron work & / stack casings with 3 ply asbestos air-cell / board & 1/2" plastic asbestos thoroughly / wired on & troweled to a smooth surface."