Search Results
- IDNO:
- 002401
- Title:
- Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory
- Description:
- Hewittic Rectifier changes AC to DC current.
- IDNO:
- 002402
- Title:
- Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory
- Description:
- Hewittic Rectifier changes AC to DC current.
- IDNO:
- 002403
- Title:
- Technician Works with Samples at an Unidentified Coal Laboratory
- IDNO:
- 002404
- Title:
- Technician Working in an Unidentified Coal Laboratory
- IDNO:
- 002405
- Title:
- Lab Technicians Perform Tests in an Unidentified Coal Laboratory
- IDNO:
- 002406
- Title:
- Pocahontas Coal Company Laboratory Technician at Work
- IDNO:
- 002407
- Title:
- Coal Lab Equipment at the Arkwright Laboratory
- IDNO:
- 002408
- Title:
- Coal Lab Equipment at the Arkwright Laboratory
- IDNO:
- 002409
- Title:
- Oven in a Coal Analysis Lab, Probably Arkwright Laboratory
- IDNO:
- 002410
- Title:
- Coal Testing Oven, Probably at the Arkwright Laboratory
- IDNO:
- 002411
- Title:
- Coal Lab Equipment at the Arkwright Laboratory
- IDNO:
- 002412
- Title:
- Coal Lab Equipment at the Arkwright Laboratory
