Subway Construction Photograph Collection. I.B., undated

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph. Photograph shows laboratory interior., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Above ground photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Above ground photograph., New-York Historical Society

: I.B.; Above ground photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society

: I.B.; Interior photograph., New-York Historical Society