In the left foreground the lathe gears are hanging on nails on the wall. But around the lathe, and on down to the end of the building, that wall looks like poured concrete. Nothing hanging on it, and over the lathe it looks like wet stains seen on concrete when the forms are pulled off. The end wall in the background, can see daylight thru some cracks. Poured walls would of been a rarity in 1916, long before the redi-Mix truck.