View of lead flashing on roof of National Lead Co.

[Factory building, structure on roof.]

[View showing use of lead inserts in constructing mausoleum at Woodlawn Cemetery.]

[View from a roof.]

[View showing use of lead inserts in constructing mausoleum at Woodlawn Cemetery.]

[View of Midtown Manhattan from a roof terrace.]

[View showing use of lead inserts in constructing mausoleum at Woodlawn Cemetery.]

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

[View of Midtown Manhattan from a roof terrace.]

[Roof of building.]

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

[Tudor City. View from roof terrace.]

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

135 Johnson Street. Edward Weck and Company plant. Interior showing making of surgical instruments

Borden's Farm Products Co. #90 Third Ave. Brooklyn N.Y. Looking North on Roof from Bergen St end of Building

Rockefeller Center. View looking down on roof garden atop British Building, [taken] from Saks and Co.

[Exhaust system on roof.]

Centre Street and Pearl Street. U.S. Federal Courthouse. Detail of roof showing lead installations