The Sand Laboratory at Mahwah regularly tested such characteristics as permiability, green strength, dry strength, effect of binders and moisture in the many types of sand used (Brake Shoe Foundries).
These are maps of the Brakeshoe factory produced by Sanborn insurance. It was drafted in 1925 but was updated until 1951. Their are also various closeups of the maps for more detail.
These are maps of the Brakeshoe factory produced by Sanborn insurance. It was drafted in 1925 but was updated until 1951. Their are also various closeups of the maps for more detail.