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13. Coal Testing Oven, Probably at the Arkwright Laboratory

14. Coal Lab Equipment at the Arkwright Laboratory

15. Coal Lab Equipment at the Arkwright Laboratory

16. Coal Lab Equipment at the Arkwright Laboratory

17. Interior of a Coal Lab, Probably Arkwright Laboratory.

18. Coal Lab Equipment at the Arkwright Laboratory

19. Coal Analysis Lab Equipment

20. Coal Analysis Lab Equipment

21. Coal Analysis Lab Equipment

Two men work in the Arkwright Quality Control Lab.

22. Arkwright Quality Control Lab