1858 First Order Fresnel Lens

1858 First Order Fresnel Lens

 

 

Dates at Fire Island Station: 1858-1933 (75 years)

 

 

in Storage: 200-2013

 

 

Height of lens: 8' 5"

Base Height: 8'2"

Diameter of Lens: 6'7"

Time to make revolution: 8 minutes

Flash: 5 seconds flash, 55 second eclipse (dark)

 

 

Manufactured by the Henry-Lepaute Company, France. Imported through Chicopee Massachusetts, by the Ames Company.

 

 

Fuel: Colza Oil, whale oil, kerosene, lard oil, mineral oil

 

 

Lens captured 80% of the light emitted by the lamp

The lens rotated by means of clockwork mechanism using weights.

 

 

Total cost in 2858: $15,000

 

Done