Washington DC History Resources

Matthew B. Gilmore

Category Archives: Columbus Delano

Pneumatic tubes: technological innovation and politics in Shepherd-era Washington DC

Excerpts.. . For complete column CLICK: Pneumatic tubes: technological innovation and politics in Shepherd-era Washington DC By Matthew B. Gilmore* Deep in the archives of the Smithsonian Institution is a … Continue reading

January 6, 2020 · Leave a comment