Page 3 - Southern Exposure - September '20
P. 3
Southern Exposure, Page 3
in Your CommunitY from page 1
J upi te r Inl e t counterclockwise
Lighthouse Facts … First around a central iron
lit July 10, 1860, west column with three
construction brick, double landings. Optic first
masonry walls, outer order Fresnel lens,
conical, tapering from manufactured in Paris
31.5 inches (eight bricks by Henry-Lepaute
thick) at ground to 18 and reputed to be the
inches (three bricks thick) oldest existing first
at base of lantern. Inner order Fresnel lens
wall cylindrical and two in Florida. Of the
bricks thick throughout. six regular orders of
Circumference at base lenses, the first is the View of the Jupiter Inlet with homes
is about 65 feet and at most powerful. Lamp and businesses
top about 43 feet. Height 1,000 watt, 120 volt,
156-to 108-foot tower GE quartz-iodine bulb socketed in a lamp changer with
on a 48-foot hill, natural an identical spare.
parabolic dune top with The second bulb rotates into position and turns on
a layer of shell. Focal whenever the first bulb fails. Range 24 miles. This is the
plane 146 feet. This is the distance that the light can be seen on a ship at sea.
level at which the beam of
light is emitted. Steps 105 View of the Jupiter Lighthouse from a boat 1962 photo of the Lighthouse and Coast Guard
cast iron stairs spiraling in the Jupiter Inlet homes
The Fresnel lens, manufactured in Paris by Henry-Lepaute and reputed to
be the oldest existing first order Fresnel lens in Florida. Of the six regular
orders of lenses, the first is the most powerful. Lamp, 1,000 watt
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