{
link: "https://www.loc.gov/pictures/item/2017878008/",
thumbnail:{
url :"https://tile.loc.gov/storage-services/service/pnp/fsac/1a34000/1a34600/1a34623_150px.jpg",
alt:'Image from Prints and Photographs Online Catalog -- The Library of Congress'
}
}
Hump master in a Chicago and Northwestern [i.e. North Western] railroad yard operating a signal switch system which extends the length of the hump track. He is thus able to control movements of locomotives pushing the train over the hump from his post at the hump office; Chicago, Ill.
- Digital ID: (digital file from original transparency) fsac 1a34623 http://hdl.loc.gov/loc.pnp/fsac.1a34623
- Reproduction Number: LC-DIG-fsac-1a34623 (digital file from original transparency) LC-USW361-529 (color film copy slide)
- Repository: Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print