Horydczak Collection: Search Results

15 results containing "Hydroelectric power."

Larger image available anywhere (15) | Larger image available only at the Library of Congress | Not Digitized

• 1.
  #gallery thc1995001439/PP

  Conowingo Hydroelectric Plant. View of Conowingo plant and dam
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H812- 1184-010 <P&P> [P&P] | LC-DIG-thc-5a37045 (digital file from original neg.)

• 2.
  #gallery thc1995001440/PP

  Conowingo Hydroelectric Plant. Water spillway at Conowingo
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H812- 1184-011 <P&P> [P&P] | LC-H812-T-1184-011 (interpositive)

• 3.
  #gallery thc1995001441/PP

  Conowingo Hydroelectric Plant. Power lines at Conowingo I
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H812- 1184-009-A <P&P> [P&P] | LC-H812-T-1184-009-A (interpositive)

• 4.
  #gallery thc1995001442/PP

  Conowingo Hydroelectric Plant. Power lines at Conowingo II
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H812- 1184-009-B <P&P> [P&P] | LC-H812-T-1184-009-B (interpositive)

• 5.
  #gallery thc1995001702/PP

  Conowingo Hydroelectric Plant. View of spillway through window of turbine hall
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184 <P&P> [P&P] | LC-H824-T-1184 (interpositive)

• 6.
  #gallery thc1995001703/PP

  Conowingo Hydroelectric Plant. Spark gap of lightning arrester
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-001 <P&P> [P&P] | LC-H824-T-1184-001 (interpositive)

• 7.
  #gallery thc1995001704/PP

  Conowingo Hydroelectric Plant. Insulators on lightning arrester
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-002 <P&P> [P&P] | LC-H824-T-1184-002 (interpositive)

• 8.
  #gallery thc1995001705/PP

  Conowingo Hydroelectric Plant. Tops of circuit breakers, connections with line on superstructure
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-003 <P&P> [P&P] | LC-H824-T-1184-003 (interpositive)

• 9.
  #gallery thc1995001706/PP

  Conowingo Hydroelectric Plant. Corona rings and choke coils on transmission line connecting superstructure
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-004 <P&P> [P&P] | LC-H824-T-1184-004 (interpositive)

• 10.
  #gallery thc1995001707/PP

  Conowingo Hydroelectric Plant. Bench board type control panel through which entire plant is controlled
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-005 <P&P> [P&P] | LC-H824-T-1184-005 (interpositive)

• 11.
  #gallery thc1995001708/PP

  Conowingo Hydroelectric Plant. Turbine hall, seven turbines in line I
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-006-A <P&P> [P&P] | LC-H824-T-1184-006-A (interpositive)

• 12.
  #gallery thc1995001709/PP

  Conowingo Hydroelectric Plant. Turbine hall, seven turbines in line II
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-006-B <P&P> [P&P] | LC-DIG-thc-5a48368 (digital file from interpositive)

• 13.
  #gallery thc1995001710/PP

  Conowingo Hydroelectric Plant. T.P. governor, automatic control of generators
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-007 <P&P> [P&P] | LC-H824-T-1184-007 (interpositive)

• 14.
  #gallery thc1995001711/PP

  Conowingo Hydroelectric Plant. Hook-up of transformer with superstructure
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-008 <P&P> [P&P] | LC-H824-T-1184-008 (interpositive)

• 15.
  #gallery thc1995001712/PP

  Conowingo Hydroelectric Plant. Close-up of spillway
  ca. 1920-ca. 1950. | 1 negative | Horydczak, Theodor, ca. 1890-1971
  LC-H824- 1184-012 <P&P> [P&P] | LC-H824-T01-1184-012 (b&w film dup. neg.)