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2389. Coal Laboratory Building

IDNO:
002396
Title:
Coal Laboratory Building

2390. Equipment in a Coal Laboratory

IDNO:
002397
Title:
Equipment in a Coal Laboratory

2391. Equipment in a Coal Laboratory

IDNO:
002398
Title:
Equipment in a Coal Laboratory

2392. Equipment in a Coal Laboratory

IDNO:
002399
Title:
Equipment in a Coal Laboratory

2393. Equipment in a Coal Laboratory

IDNO:
002400
Title:
Equipment in a Coal Laboratory
Hewittic Rectifier changes AC to DC current.

2394. Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory

IDNO:
002401
Title:
Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory
Description:
Hewittic Rectifier changes AC to DC current.
Hewittic Rectifier changes AC to DC current.

2395. Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory

IDNO:
002402
Title:
Hewittic Rectifier at Jamison Coal Mine No. 9 Laboratory
Description:
Hewittic Rectifier changes AC to DC current.

2396. Technician Works with Samples at an Unidentified Coal Laboratory

IDNO:
002403
Title:
Technician Works with Samples at an Unidentified Coal Laboratory

2397. Technician Working in an Unidentified Coal Laboratory

IDNO:
002404
Title:
Technician Working in an Unidentified Coal Laboratory

2398. Lab Technicians Perform Tests in an Unidentified Coal Laboratory

IDNO:
002405
Title:
Lab Technicians Perform Tests in an Unidentified Coal Laboratory

2399. Pocahontas Coal Company Laboratory Technician at Work

IDNO:
002406
Title:
Pocahontas Coal Company Laboratory Technician at Work

2400. Coal Lab Equipment at the Arkwright Laboratory

IDNO:
002407
Title:
Coal Lab Equipment at the Arkwright Laboratory