E.C. Delafield house.

E.C. Delafield house.

15 East 40th Street. E.C. Hunt, Jr., at work.

[Man working on a camera lens.]

[Man working with scientific equipment.]

[C.M. Sorensen & Co. Inc. vacuum pump.]

Mr. E.C [Edward Collins] Knight [Jr.]

[Camera factory.]

[Interior, camera store.]

Hunter College, laboratory.

Hunter College, laboratory.

Hunter College, laboratory.

[Hunter College.]

Hunter College, laboratory.

[Street repair.]

[Street repair.]

[Interior, office.]

[Hunter College.]

[Hunter College.]

Woolworth Building, from C platform looking N.E.