Official cars transporting delegates of the Pan American Highway Commission pass by two arch bridges in Pennsylvania during a United States tour. One bridge is the Kingsley Bridge (Martin Creek Viaduct) and the other is the Tunkhannock Viaduct known as the Nicholson Bridge. It is the largest concrete bridge in the world. It spans Tunkhannock Creek in Nicholson, Wyoming County, Pennsylvania. A man walking along the sides of the road is seen.
Views of the Flat Iron building and other shops and offices in New York City. Dignitaries and spectators observe the ten millionth Ford Model-T as its motorcade passes through the city. A marching band led by an American flag parade with the motorcade. Motorcade passes through the streets and tall building visible.
A film 'How to prevent disease' shows the precautions taken to prevent diseases in New York, United States. The Croton and the Ashokan Reservoir as examples of pure, clean water supply. An animation depicts how the well water gets contaminated by sewage from various sources.
Precautions taken to prevent diseases in New York, United States. A woman with a child is about to enter a house. A notice by the Department of Health at the entrance reads that people should not enter the building as it is infected by scarlet fever. The woman reads the notice and returns.
Precautions taken to prevent diseases in New York, United States. Strata charts show a decrease in the deaths due to small pox in New York city after the systematic vaccination that began in 1875.
Precautions taken to prevent diseases in New York, United States. Bar diagrams show the deaths in 1890 due to diphtheria before the use of antitoxin and significant reduction in the death toll after its use in 1920.