Chemical laboratory showing apparatus for testing the absorbent power of the carbon and gran powder.
Retort house. Discharging machine drawing out the nearer half and pushing out the far half of the hot carbon.
Carbon plant No. 3, showing treater room and west side batteries of Dorsite treaters.
FOUR VIEWS OF CARBON PLANT AT ASTORIA, L. I.
Zigzagging and combing work on masks.
Doping the masks.