Iron beam under construction at Carnegie Steel Company's Homestead Plant in Pittsburgh, Pennsylvania for construction of the Empire State Building in New York City. American Bridge Company's Plant at Ambridge, Pennsylvania. Riveting iron beam. Drill machine rivet C B section of the beam. Worker rivet side web section of the beam with a machine.
Iron beam under construction at Carnegie Steel Company's Homestead Plant in Pittsburgh, Pennsylvania for the Empire State Building construction in New York City. American Bridge Company's Plant at Ambridge, Pennsylvania. Worker hammers side web section and insert it to iron beam. Double end milling machine finishes column to proper length from both the ends.
Iron beam under construction at Carnegie Steel Company's Homestead Plant in Pittsburgh, Pennsylvania for the Empire State Building construction in New York City. American Bridge Company's Plant at Ambridge, Pennsylvania. A man shows parts of finished column with the help of a pointer. Animation shows the assembly of beam parts. Wing plates placed. Placement of cover plates. Side web section insertion. Other small parts assembled on beam. Finished beam carried by a crane and placed on a carrier truck. Workers observe the transfer.
Exterior view of Lowell Observatory building in Flagstaff, Arizona. People exiting a main building of the Arizona State Teachers College. Color film scenes from the annual Native American All-Indian Pow-Wow parade circa 1939 in Flagstaff, Arizona. Citizens line the parade route street and native American Indian Men in traditional regalia walk and dance traditional Indian dances on the streets of Flagstaff, Arizona during the Pow Wow. People watch on the sides of the parade route. A native American Indian Apache tribe woman with her young baby in a traditional wrapping. Close-up of an old Apache Indian woman who leans on a cane. The elderly native American woman then smiles and laughs. Cattle herds on a field. Apache horsemen and cowboys on horses work among the herd. Close views of cattle and calfs. Cowboys rope and lasso cattle. View of a burning fire and brands heating in the fire. Cowboys turn a cow on its side and cowboy brings a hot brand to brand the cattle.
Shows crowd gathered outside the Little Rock Central High School in Arkansas, in 1957, protesting admission of African American students during civil rights movement. Shows "Little Rock Nine" in station wagon being escorted to the school by armed Federal troops. Ernie Green reflects on the experience of the troop escort. Views of Ernest Greene at Michigan State University in a library and Professor Greene teaching in a classroom. Green is seen on a building site working to encourage black apprenticeships in the building trades. Ernest Green seated in an office.
Electromagnetic Hazards Group conducts ball lightning tests under Project Tesla, inside a hangar at Wendover Air Force Base in Utah. An interviewer gets information from the scientists. A team member talks about modern aircraft, new material and avionics system susceptible to lightning. He states that the composite materials used in new aircraft are stronger and don't conduct electricity like conventional metals. The team's research work involves protective measures and verification of the same. He discusses the effect of lightning on aircraft electronics, and the use of Wendover as the research facility due to its reproduction of long arcs. The aim is to study the effects of atmospheric electricity on new materials and electronics systems in modern aircraft. Robert Golka talks about a new company to study and create ball lightning, and apply it to nuclear fusion research.
CRITICALPAST.COM: About Us | Contact Us | FAQs - How to Order | License Agreement | My Account | My Lightboxes | Shopping Cart | Advanced Search | Featured Collections | Website Terms & Conditions | Privacy Policy ©2026 CriticalPast LLC.
License Agreement |
Terms & Conditions |
Privacy Policy
©2026 CriticalPast LLC.