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Img 4627

Tillamook Rock Light Station, Oreg.
1. Lens made by Henry Lefrante, Paris.
First order, catadioptric Fresnal lens.
Revolving, once in two minutes, with white flash every five seconds.
24 panels in lens apparatus.
18 prisms above dioptric drums.
8 “ below “ “ .

2. Funk’s 1st order hydraulic float lamps.
Height from base to top of burner, 34.31 inches.
3. Distance “between centers of bolts on which the lamp directly rests”, 15.82 inches.
6. Height from focal plane of lens to lower edge of cylinder at top, 62.52 inches. Inside diameter of this cylinder 6.29 inches.

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