Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More