Philadelphia Area Archives

Start Over Organization Pennsalt Chemicals Corporation

John E. Mehren Chemical Industries Publications Collection, 1932-1992 (inclusive)

Extent:: 1.0 linear feet (1 record box.)
Abstract:: A collection of chemical industry marketing materials and technical bulletins from 1932 to 1996 as collected and maintained by John E. Mehren on the behalf of the PM Chemical Company.

Held at: Science History Institute Archives [Contact Us]

Herbert T. Pratt ephemera collection, 1830-1961 (inclusive)

Extent:: 0.10 linear feet (1 folder)
Abstract:

Held at: Science History Institute Archives [Contact Us]