1904
B. L. Singley, 1900
B. L. Singley, 1896
B. L. Singley, 1898
B. L. Singley, 1899
B. L. Singley, 1894
B. L. Singley, 1897
B. L. Singley, 1905
B. L. Singley, 1902
B. L. Singley, 1893
![Front View of Ladle Emptying Molten Metal into Moulds, Pig Iron Machine, Pittsburg[h], Pa., U.S.A.](https://media.getty.edu/iiif/image/19efcf12-004d-4be0-afe1-80ecebe2312b/full/843,/0/default.jpg)
