This Photograph appears
in the following Albums:
| Image ID: | 277 |
| Title: | Rebuilding the glass melting furnace in the Bryn Athyn glass factory |
| Source: | Raymond and Mildred Pitcairn Archives, Bryn Athyn, PA |
| Date: | Unknown |
| Medium: | 35mm slide |
| Description: | With temperatures inside the glass furnace reaching up to 3000F, even the tough firebrick used to construct it eventually degraded, and the furnace had to be rebuilt once every six months. |